統計與機率
資料分析、機率分佈、假設檢定與統計方法。
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section 7.2 homework score: 3/14 answered: 3/14 question 4 for a standa…
$0.12$
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section 7.2 homework due monday by 11:59pm points 14 submitting an exte…
$0.2864$
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section 7.2 homework due monday by 11:59pm points 14 submitting an exte…
$0.9920$
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which is the best definition of satire? writing that employs irony to a…
writing that uses critique to draw attention to an issue by exaggeration or irony
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section 7.2 homework due monday by 11:59pm points 14 submitting an exte…
$0.0239$
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the graph of the normal curve the diagram below shows a graph of a norm…
42, 49, 56, 63, 70, 77, 84
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the graph illustrates the \distribution of the prices of college textbo…
$\mu = 217$ $\sigma = 26$
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consider the following normal curves, which of the following is true: t…
The two curves have equal means. The two curves have equal medians. Curve 2 has a larger standard deviation.
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the picture below has 3 normal curves plotted on the same set of axes. …
The three distributions all have the same mean because each curve has the same center and the three distributions have different standard deviations.
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consider the below normal curves. determine which normal curve has the …
1. C. blue curve (dashed curve) 2. A. blue curve (dashed curve)
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draw the graph of a normal curve with mean 45 and standard deviation 8
The correct graph should have the peak at $x = 45$ (the mean), and points of inflection at $x = 37$ and $x = 53$. The values on the x - axis should be symmetrically spaced around …
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score on last try: 0.33 of 1 pts. see details for more. at least one sc…
Left box: 42, Right box: 48
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according to national testing data, college math class testing times ar…
42, 45, 48
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the shaded region in the histogram below represents what? 140 160 180 2…
C. the area of the bins and the probability of a height between 180 cm and 185 cm
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exactly 50% of the area under the normal curve lies to the left of the …
True
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if a distribution is normal, then it is not possible to randomly select…
False
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since the area under the normal curve within two standard deviations of…
False
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births are approximately uniformly distributed between the 52 weeks of …
a. \(0.0000\) b. \(0.0962\) c. \(0.5577\) d. \(0.6296\) e. \(43.6400\)
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the time that it takes for the next train to come follows a uniform dis…
c. 0.2500 d. 0.1000 e. 9.2000 f. 0.5294
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section 7.1 homework score: 2/16 answered: 2/16 question 3 the time it …
$0.13$
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the probability distribution of a random variable x is given in the fig…
$0.7400$
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section 7.1 homework score: 0/16 answered: 0/16 question 1 if x is a co…
True
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the following data represent the number of drivers involved in a fatal …
C. Dark, but lighted is more dangerous in normal weather because the conditional probability of a fatal crash in normal weather is greater than that of a fatal crash in snow/sleet.
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11. what is the significance of the robert halderman case? 12. state th…
11. Significance depends on case details for legal development. 12. Class: group - associated; Individual: single - source - linked. 13. Class: No; Individual: Yes. 14. Eliminates…
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(a) among total crashes in other weather conditions, what is the probab…
$0.023$
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the following data represent the number of drivers involved in a fatal …
$0.491$
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in a recent poll, a random sample of adults in some country (18 years a…
$0.599$
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in a recent poll, a random sample of adults in some country (18 years a…
0.254
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according to a research agency, in 22% of marriages the woman has a bac…
$0.629$
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according to a research agency, in 22% of marriages the woman has a bac…
$0.611$
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suppose that a single card is selected from a standard 52 - card deck. …
0.333
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suppose that a single card is selected from a standard 52 - card deck. …
$0.077$
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suppose that e and f are two events and that n(e and f)=230 and n(e)=60…
$0.383$
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suppose that e and f are two events and that p(e and f)=0.4 and p(e)=0.…
$0.5$
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a golf ball is selected at random from a golf bag. if the golf bag cont…
$0.550$
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find the probability p(e^c) if p(e)=0.18. the probability p(e^c) is . (…
$0.82$
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the graph provides a good approximation of the number of food - stamp r…
The average rate of change is \(-0.58\) million recipients per year. A negative slope means the number of food - stamp recipients decreases by 0.58 million a year. So the answer i…
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a probability experiment is conducted in which the sample space of the …
$E^c=\{1,7,8,9,10,11,12\}$, $P(E^c)=\frac{7}{12}$
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8.sp.a.2 additional practice (cont’d) for numbers 4 - 6, write the equa…
4) $y=x + 1$ 5) $y=-\frac{13}{12}x+26$ 6) $y=-\frac{1}{3}x+\frac{53}{3}$
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a standard deck of cards contains 52 cards. one card is selected from t…
0.154 For part (b) and (c), we will continue in the same step - by - step manner: (b)
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if p(e)=0.50, p(e or f)=0.55, and p(e and f)=0.10, find p(f). p(f)= (si…
$0.15$
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find the probability of the indicated event if p(e)=0.20 and p(f)=0.45.…
$0.5$
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a probability experiment is conducted in which the sample space of the …
A. $P(F\text{ or }G)=\frac{6}{12}+\frac{4}{12}-\frac{2}{12}=0.667$
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a probability experiment is conducted in which the sample space of the …
0.667
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the graph shows the battery usage for an appliance based on hours run. …
1. **For question 5**: - # Explanation: - **Step1: Substitute \(x = 12\) into the equation \(y=-3x + 96\)** - \(y=-3\times12 + 96\) - **Step2: Calculate the value of \(y\)** - Fir…
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a probability experiment is conducted in which the sample space of the …
A. $F$ or $G = 9,10,11,12,13,14,15,16$
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a probability experiment is conducted in which the sample space of the …
B. $P(F\ or\ G)=\frac{6}{12}+\frac{4}{12}-\frac{2}{12}=0.667$
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a probability experiment is conducted in which the sample space of the …
$0.667$
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a probability experiment is conducted in which the sample space of the …
A. F or G = {3,4,5,6,7,8,9,10}
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use the graph to answer the question. the bar graph shows the number of…
B. 46
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according to a center for disease control, the probability that a rando…
D. No, because hearing and vision problems are not mutually exclusive. So, some people have both hearing and vision problems. These people would be included twice in the probabili…
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a probability experiment is conducted in which the sample - space of th…
List the outcomes in E and G: B. E and G = {} Are E and G mutually exclusive? B. Yes, because the events E and G have no outcomes in common.
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graphs unit test high school enrollments if a fifth high school is adde…
7
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a probability experiment is conducted in which the sample space of the …
B. E and G = {}
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graphs unit test the graph shows the enrollment at four high schools. h…
Liberty
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use the graph to answer the question. how many people averaged fewer th…
7
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the key for a stem - and - leaf plot is 12|5 = 125. identify the leaf: …
B. 6
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use the table to answer the question. you collected the following data …
$24\%$
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a probability experiment is conducted in which the sample space of the …
B. E and G = {}
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a probability experiment is conducted in which the sample space of the …
List the outcomes in E and F: A. {12,13} Are E and F mutually exclusive? C. No. E and F have outcomes in common.
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a probability experiment is conducted in which the sample space of the …
A. 12,13; No, E and F are not mutually exclusive.
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11. which meaning of the word pen is used in this sentence? i was able …
to write
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a bag of 100 tulip bulbs purchased from a nursery contains 30 red tulip…
(a) 0.3 (b) 0.35 (c) A. If 100 tulip bulbs were sampled with replacement, one would expect about 30 of the bulbs to be red and about 35 of the bulbs to be purple.
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6. which meaning of the word project is used in the following sentence?…
speak loudly
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a bag of 100 tulip bulbs purchased from a nursery contains 30 red tulip…
(a) 0.3 (b) 0.35 (c) The probability 0.3 of selecting a red tulip means about 30% of the time a red - colored tulip bulb would be selected in repeated selections. The probability …
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a bag of 100 tulip bulbs purchased from a nursery contains 30 red tulip…
(a) 0.3 (b) 0.35 (c) The probability 0.3 means that in repeated random selections of a tulip bulb, about 30% of the time a red tulip bulb will be chosen. The probability 0.35 mean…
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1. which phrase in the sentences is a simile? the horse stomped the gro…
B. like he was putting out a fire
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1. what does the prefix a, ab, abs mean? - a) toward - b) away, from - …
1. b. away, from 2. b. annex 3. b. two 4. a. circum 5. b. with, together 6. a. de
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clance, roberto, and john work for a publishing company. the company wa…
(a) D. CR, CJ, RJ (b) 0.333 (c) 0.667 (d) 0.333
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use the graph to answer the question. the bar graph shows the number of…
15
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clance, roberto, and john work for a publishing company. the company wa…
(a) D. CR, CJ, RJ (b) $\frac{1}{3}$ (c) $\frac{2}{3}$ (d) $\frac{1}{3}$
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let the sample space be s = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}. suppose th…
0.3
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let the sample space be s = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}. suppose th…
0.2
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the table shows the movement of walt disney stock for 30 randomly selec…
A. Yes, because as we increase the number of trials of a probability experiment, our estimate becomes more accurate due to the Law of Large Numbers.
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question 1 which sentence is most important to include in a summary of …
A. Ayurveda is a medicine system from ancient India that focused on balancing the mind, body, spirit, and environment.
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the table shows the movement of walt disney stock for 30 randomly selec…
It is not unusual because for every 100 days, we can expect about 50 of those days to show "Down".
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the table shows the movement of walt disney stock for 30 randomly selec…
(c) 0.400 (d) is not; 50
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the table shows the movement of walt disney stock for 30 randomly selec…
0.400
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the table shows the movement of walt disney stock for 30 randomly selec…
empirical
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the table shows the movement of walt disney stock for 30 randomly selec…
| Stock Movement | Probability | | ---- | ---- | | Up | 0.400 | | Down | 0.500 | | No Change | 0.100 |
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exercise f fill in the blanks to complete the conversation. (1) a: do y…
(1) does it mean (2) do you spell it (3) does he sleep (4) Do you have (5) do you have (6) do you say (7) is his name (8) is he (9) do they live (10) do they cost (11) Are parrots…
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called purple states. 4. the federalist/democratic/republican party in …
4. Federalist 5. Democratic 6. Red 7. Rolling realignment refers to the gradual and continuous shift in party - voter allegiances over time.
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the pacific ocean is calmer than the atlantic ocean. fittingly, pacific…
A. NO CHANGE
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in a national survey college students were asked, how often do you wear…
| Response | Probability | |--|--| | Never | 0.028 | | Rarely | 0.065 | | Sometimes | $\frac{560}{4747}\approx0.118$ | | Most of the time | $\frac{1313}{4747}\approx0.277$ | | Alw…
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question 7 of 8 > attempt 3 when interest rates are low, some automobil…
Rebate You would save $44.00$
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meaning options (3 of 3) to write a capital letter a word that modifies…
adjective: a word that modifies, or describes, a noun or pronoun capitalize: to write a capital letter proper adjective: a specific adjective that begins with a capital letter whe…
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in a national survey college students were asked, how often do you wear…
0.066
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in a national survey college students were asked, \how often do you wea…
$0.525$
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a police officer randomly selected 552 police records of larceny thefts…
(a) Calculate probabilities for each type of larceny theft using $P=\frac{\text{Number of offenses of that type}}{552}$ and round to three decimal places. (b) Calculate the probab…
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in a national survey college students were asked, how often do you wear…
A. Yes, because P(never) < 0.05
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in a national survey college students were asked, how often do you wear…
$0.250$
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in a national survey college students were asked, \how often do you wea…
(a) | Response | Probability | |--|--| | Never | $0.024$ | | Rarely | $0.075$ | | Sometimes | $0.127$ | | Most of the time | $0.119$ | | Always | $\frac{7313}{9456}\approx0.774$ |…
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in a national survey college students were asked, \how often do you wea…
0.127
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in a national survey college students were asked, \how often do you wea…
0.074
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in a national survey college students were asked, how often do you wear…
$0.024$
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a survey of 200 randomly selected high school students determined that …
(a) $0.750$ (b) B. If 1,000 high school students were sampled, it would be expected that about 750 of them play organized sports.
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a survey of 200 randomly selected high school students determined that …
(a) $0.750$ (b) If we randomly select a high - school student from the population that is similar to the surveyed group, there is a $75.0\%$ chance that the student plays organize…
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if a person draws a playing card and checks its suit and then spins a t…
C1, C2, C3, D1, D2, D3, H1, H2, H3, S1, S2, S3
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which of the following numbers could be the probability of an event? 0,…
\(0,0.05,0.32,1\)
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8. (review from unit 1) given the following data set: 65, 70, 70, 70, 7…
I, II, and III are correct for this data set.