Question

1. Find the mode(s) of the following amounts (in thousands of dollars) in savings accounts of randomly selected people aged 25-30.

10,2,10,4,6,2,2,3,1,1,2,1

Separate answers with a comma if needed.

 

2.

A group of visitors at a particular movie theater were surveyed about the number of movies they have seen at this theater over the past year. Their responses are summarized in the relative frequency table below.

What is the cumulative relative frequency of people who have seen 15 or fewer movies?

Movies Seen Relative Frequency
1 0.10
5 0.35
10 0.20
15 0.15
20 or more 0.20

 

3.

For the following data set, you are interested to determine the "spread" of the data.

Would you employ calculations for the sample standard deviation, or population standard deviation for this data set:

  • You are interested in the heights of students at a particular middle school. Your data set represents the heights of all students in the middle school with 600 students.

Select the correct answer below:

 

Use calculations for sample standard deviation.

 

Use calculations for population standard deviation.

 

 

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