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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suppose that you are offered the following \deal.\ you roll a six - sid…
$1.67$
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a pair of fair dice is tossed. define the events a and b as follows. co…
$P(A)=\frac{11}{36}$, $P(B)=\frac{1}{6}$, $P(A\cap B)=\frac{1}{18}$, $P(A\cup B)=\frac{5}{12}$, $P(A^{C})=\frac{25}{36}$
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suppose that you are offered the following \deal.\ you roll a six sided…
a. | $X$ | $P(X)$ | | ---- | ---- | | -10 | 0.3333 | | 5 | 0.6667 | b. $0$
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section 6.1 homework score: 8.67/21 answered: 9/21 question 12 suppose …
a. | $X$ | $P(X)$ | | ---- | ---- | | - 10 | $0.1667$ | | 5 | $0.6667$ | | 7 | $0.1667$ | b. $-\$7.17$ c. No.
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section 6.1 homework score: 8.67/21 answered: 9/21 question 12 suppose …
a. | X | P(X) | |----|----| | - 10 | $\frac{1}{6}$ | | - 5 | $\frac{2}{3}$ | | - 3 | $\frac{1}{6}$ | b. -$5.50$ c. If you play many games, on average, you will lose $5.50$ per gam…
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score on last try: 0.25 of 1 pts. see details for more. at least one sc…
$10.37$
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section 6.1 homework score: 7.92/21 answered: 9/21 question 11 score on…
$\sigma^{2}=14.47$ $\sigma = 3.80$
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section 6.1 homework due monday by 11:59pm points 21 submitting an exte…
$\mu = 10.37$, $\sigma^{2}=14.47$, $\sigma = 3.80$
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find the standard deviation of this probability distribution. give your…
$1.14$
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section 6.1 homework score: 5.67/21 answered: 6/21 question 9 |x|p(x)| …
$2.2$
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the distribution of the tuitions, fees, and room and board charges of a…
The sample mean is $\$20864.88$ and the sample standard deviation is $\$2669.57$.
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a local bakery has determined a probability distribution for the number…
Probability of selling 15 cheesecakes: 0.33 Probability of selling at least 10 cheesecakes: 0.78 Probability of selling 5 or 15 cheesecakes: 0.45 Probability of selling 25 cheesec…
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data were collected from a survey given to graduating college seniors o…
a. \(0.753\) b. \(0.731\) c. \(0.11\)
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data were collected from a survey given to graduating college seniors o…
a. \(0.753\) b. \(0.529\) c. \(0.09\)
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data were collected from a survey given to graduating college seniors o…
a. $0.753$ b. $0.731$ c. $0.146$
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d. the probability of x being no less than a: p(x ≤ a) p(x > a) p(x = a…
d. $P(X\geq a)$ e. $P(X > a)$ f. $P(X = a)$
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each data pair shown is of the form below: (years since purchase, value…
6019
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a. the probability of x being no more than a: p(x ≥ a) p(x = a) p(x ≤ a…
a. $P(X\leq a)$ b. $P(X\geq a)$ c. $P(X\leq a)$ d. $P(X\geq a)$ e. $P(X > a)$ f. $P(X = a)$
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section 6.1 homework score: 2/21 answered: 2/21 question 5 complete the…
0.2
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section 6.1 homework score: 1/21 answered: 1/21 question 4 given a surv…
true
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section 6.1 homework score: 0/21 answered: 0/21 question 3 if two six -…
A. false
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determine whether this table represents a probability distribution. |x|…
Yes, it is a probability distribution
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section 6.1 homework score: 0/21 answered: 0/21 question 1 let x repres…
X is a random variable
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the correlation coefficient for the linear regression of the enrollment…
$0.996$
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a tile is selected from seven tiles, each labeled with a different lett…
(a) A, C (b) A, B, C, D, E, F (c) E, F, G
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a marble is selected from a bag containing eight marbles numbered 1 to …
(a) 1,3,4,5,6,7 (b) 3,5 (c) 1,2,7,8
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the accompanying venn diagram describes the sample - space of a particu…
a. $P(A)=0.4$, $P(B)=0.3$ b. $P(A)=0.6$, $P(B)=0.2$
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a number cube with faces labeled 1 to 6 is rolled once. the number roll…
(a) 6 (b) 2,4,5,6 (c) 1,3,5
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in the 1960s, filipino and latino farmworkers in california went on str…
boycott
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multiple choice 10 points what does biased information mean? a. the aut…
c. The author has placed their own perspective into the writing.
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select the word that means very sad and hopeless. aspiring writers and …
despondent
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in robert louis stevensons book the strange case of dr. jekyll and mr. …
Antagonist
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select the word that means having a huge appetite. the shrew is a tiny,…
voracious
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select the word that means a state of resting. mary cassatt was a ninet…
repose
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the table summarizes the distribution of age and assigned group for 90 …
B. \(\frac{1}{4}\)
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the table summarizes the distribution of age and assigned group for 90 …
B. $\frac{1}{4}$
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the puppy was weighed again at 9 months old and weighed 52 pounds. data…
A. 5.9
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excited her - a picture book called stevie, by john steptoe, about an a…
jacqueline was especially grateful for authors who wrote about black girlhood. Reading books written by people who were black girls to her felt very important to Jacqueline.
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home > leaked exams > august 2025 international form a (complete exam) …
C. 5
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for how many of the 9 data points is the actual y - value greater than …
7
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which of the following statements must be true? i. the median of data s…
D. Neither I nor II
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the distribution of the tuitions, fees, and room and board charges of a…
$20864.88$
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in france, from 1643 - 1715, king louis xiv ruled as king. * 1 point de…
1. B. Monarchy 2. A. Theocracy 3. B. Democracy
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5. choose the best answer. just because you are good at something does …
A. enjoy
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evaluate $sigma=sqrt{\frac{sum (x - mu)^2}{n}}$ given $mu = 7.32$, $n =…
$0.74$
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evaluate $\frac{sum z}{100}$ |z| - 2056| - 2674| - 2845| - 2913| - 2847…
$-199.3$
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26. what does it mean to \aim high\ in steering? a. to look at the tops…
26. B. To look far ahead when you drive. 27. B. To show where you must stop for a stop sign or red light. 28. C. Shift into "park" and turn off the engine. 29. C. 1 year 30. B. To…
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1. what does a red \x\ lane signal mean? a. the lane is for emergency v…
1. C. Drivers may not use the lane. 2. C. 1 - year suspension 3. B. 3 years 4. B. In an emergency. 5. C. 0.18 g/dL
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question 6 of 6 recovery is possible but it is a process. this means re…
B. people may need support to continue their recovery
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kennedy and the cold war instruction active preventing nuclear war read…
His focus is on peace with the communists rather than on defeating them.
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the block of text below, taken from an evaluation of a shopping website…
Nevertheless, Polyvore has a couple shortcomings.
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a large movie - theater tracked its total number of tickets sold each d…
4645
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all guided lecture sheets (gls) must be submitted to gradescope in thei…
a. $(g\circ f)(x)=-\frac{3}{\sqrt{2 - 4x}}$ b. $(-\infty,\frac{1}{2})$
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linear equations w/ distribution (lev 1) score: 4/5 penalty: none quest…
$y=1$
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linear equations w/ distribution (lev 1) score: 3/5 penalty: none quest…
$y = 3$
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linear equations w/ distribution (lev 1) score: 1/5 penalty: none quest…
$y = 8$
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the distribution of the tuitions, fees, and room and board charges of a…
$20230.12$
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error analysis describe and correct the error in determining if 8 is in…
The error in the original analysis is incorrect simplification of the left - hand side of the inequality. To correctly determine if 8 is in the solution set, substitute 8 into the…
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the purpose of this space is unclear. which of these possibilities is l…
Used as some sort of market or exchange
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19. what is the first step in the problem - solving process? a) brainst…
19. c) Identifying and defining the problem clearly 20. b) Encourage wild or unusual ideas without judging them at first 21. b) Create an action plan to implement the solution 22.…
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12. a collaborative team member is someone who: a) only does their own …
12. b) Works together with others to create something 13. c) Ideas and concerns are shared openly and respectfully 14. b) Taking responsibility for your tasks and commitments 15. …
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select the correct answer. neil donated 30 notebooks to a local school …
D. Ronald's box
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at of each number, write a word that includes meaning of the word. then…
A. (No match in options for "not" prefix). B. sub - C. ad - D. con - E. trans - F. ject G. gen H. path I. vert J. -ology
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select the correct answer. the transportation department of frederick i…
D. As the sample size is appropriately large, the margin of error is 0.079.
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my virtual academy... box plot graph. box... next post test: inferences…
90% confidence interval: (34%, 60%) 95% confidence interval: (32%, 60%)
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select the correct answer from each drop - down menu. a veterinarians o…
Percentage of patients that were dogs: $46\%$ 90% confidence interval: $(34.4\%,57.6\%)$ 95% confidence interval: $(32.2\%,59.8\%)$
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select the correct answer from the drop - down menu. the number of book…
2.5
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select the correct answer. the data manager for a state political party…
D. 70,244 and 70,632
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drag the values to the correct locations on the image. not all values w…
The left - hand box: 98.75; the top box in the fraction: 10.45; the bottom box in the square - root: 60.
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18 type the correct answer in the box. use numerals instead of words. t…
95
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select the correct answer. which measure describes the standard error o…
A. the standard deviation of the means
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select the correct answer. the numbers of pages in the books in a libra…
B. About 16% of the books have fewer than 150 pages.
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select the correct answer. a population has a standard deviation of 7.8…
C. 0.46
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select the correct answer. the city transit authority surveyed 1,000 ci…
C. The report's claim is true.
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select the correct answer. energized and powercell are companies that m…
A. Both manufacturers' claims are true because most of their batteries lasted longer than the average alkaline battery.
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select the correct answer. a researcher for a travel company is looking…
B. $257.82$ and $272.18$
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post test: inferences from data pinks 22% blues 29% yellows 24% greens …
- Since only existing customers were surveyed, the results were not random. - The mail - in survey may have resulted in an undercoverage bias. - The difference among the percentag…
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a national restaurant chain claims that their servers make an average o…
A. 2.56%
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type the correct answer in the box. use numerals instead of words. a tr…
$0.78$
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select all the correct answers. two friends worked together on an essay…
A. Put both names in equal amounts into a hat and draw one without looking B. Ask a random friend to choose E. Ask a stranger to flip a coin
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select the correct answer. mike wants to find the confidence interval f…
B. the critical value
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select the correct answer. which data set is the farthest from a normal…
E. 2, 4, 5, 5, 6, 6, 7, 7, 7, 8, 8, 9, 9, 10
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select the correct answer. the income distribution in a county is a nor…
D. 84% of the wage earners earn less than $14,000$ each.
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type the correct answer in each box. use numerals instead of words. if …
60, 10
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select the correct answer. juan runs a company that makes pens. he noti…
D. His model can be improved the most by removing all the face cards and aces from the deck.
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type the correct answer in each box. use numerals instead of words. a c…
31, 0.05
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select the correct answer. a veterinarian is interested in the average …
A. survey
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type the correct answer in each box. use numerals instead of words. stu…
making a brochure: 4 blue chips writing a news article: 6 yellow ships designing a computer presentation: 10 red chips
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question enola borrowed some money from her friend in order to help buy…
The equation for $L$ is $L=-20t + 100$. The x - intercept is $t = 5$, which means it takes 5 weeks for Enola to pay off her loan.
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select the correct answer. a restaurant owner wants to determine the ef…
A. The sample is the randomly selected customers.
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select the correct answer. members of a student council are designing a…
B. The sample proportion would less closely model the population proportion.
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question 7 of 8 select the correct answer. samantha is conducting an ex…
$\frac{7}{27}$
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question 7 of 8 select the correct answer. samantha is conducting an ex…
$\frac{7}{27}$
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question 6 of 8 select the correct answer. a juice tasting was conducte…
Given the person selects juice C, the probabilities of the person being from any group are similar.
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type the correct answer in each box. use numerals instead of words. a m…
$2.5$
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select the correct answer. mateo teaches a continuing education class a…
A. It is valid if the result from all the surveys and the model get closer together.
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drag each tile to the correct box. three groups of employees are evalua…
1. An employee is from group A and the performance is below expectations (least probability) 2. An employee is from group B and the performance meets expectations 3. An employee i…
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select all the correct answers. paul needs to randomly select one of hi…
A. a standard deck of cards C. a six - sided number cube D. two coins E. a spinner divided evenly into 12 sections, with three sections each of four different colors
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question 4 of 8 select the correct answer. consider the probabilities s…
Since \(P(A\cap B)=P(A)\times P(B)\), \(A\) and \(B\) are independent events.
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select the correct answer. which statement is true? a. a sample statist…
D. To calculate a point estimate, we need to know the sample size.