Question

warm - up calculate the mean of each data set. 8,9,9,9,10 practice 1. select all the measures of center. mean □ iqr (interquartile range) □ mad (mean absolute deviation) □ median □ range you wonder: how much time do seventh graders at my school spend outdoors on a typical day? 2.1 what is the population for your question? 2.2 select all possible samples that are part of the population for your question. a. the 20 students in a seventh grade math class b. the first 20 people to arrive at your middle school on a particular day c. the seventh graders participating in a science fair with students from four middle schools d. the 10 seventh graders on the school soccer team e. the students on the high school debate team 2.3 select two samples from above and list another possible population each sample could belong to. sample: possible population: sample: possible population:

Explanation:

1.

Step1: Recall measures of center

Measures of center describe the middle of a data - set. Mean and median are measures of center. IQR, MAD, and range are measures of spread.

The population is the entire group of interest. Here, the group of interest is seventh - graders at the school.

Samples should be subsets of the population (seventh - graders at the school).

Step1: Analyze option A

The 20 students in a seventh - grade math class are seventh - graders at the school, so it's a sample.

Step2: Analyze option B

The first 20 people to arrive at the middle school may not all be seventh - graders, so it's not a sample.

Step3: Analyze option C

Seventh - graders participating in a science fair with students from four middle schools are seventh - graders, so it's a sample.

Step4: Analyze option D

The 10 seventh - graders on the school soccer team are seventh - graders at the school, so it's a sample.

Step5: Analyze option E

The students on the high - school debate team are not seventh - graders, so it's not a sample.

Answer:

Mean, Median

2.1