Question

Principal Coleman used random samples from student

records to determine how many people live in each

student's household.

What is the mean total household of the 7th-grade

sample to the nearest tenth?

7th-Grade Total Household

What is the mean total household of the 8th-grade

sample to the nearest tenth?

5,4,4,4,4, 7, 3, 4, 2, 3,

4.4, 2, 4, 3, 8, 7, 5, 4,5

8th-Grade Total Household

7,5,5,5, 3, 4, 5, 3, 2, 8,

6,5,6,3,3,4,4,53,4

Done

Answer 1

7th grade: C

8th grade: B

Explanation:

100% true

Answer 2

7th-grade: 4.3

8th-grade: 4.5

Explanation:

7th-grade and 8th-Grade samples have 20 data points. The mean is obtained adding the values of the data set and dividing this addition by the amount of values.

Mean total household of the 7th-grade sample: (5+4+4+4+4+ 7+ 3+ 4+ 2+ 3+ 4+4+ 2+ 4+ 3+ 8+ 7+ 5+ 4+5)/20 = 4.3

Mean total household of the 8th-grade sample: (7+5+5+5+3+ 4+ 5+ 3+ 2+ 8+ 6+5+6+3+3+4+4+5+3+4)/20 = 4.5