Module 5 Review

The fourth grade teacher measured the height of each student at the beginning of the year. Complete the frequency chart for the student heights.

119, 120, 130, 115, 122, 122, 117, 125, 127, 120, 117, 121, 118, 125, 129, 121, 125, 124, 124, 115

• 4

• 0

• 2

• 3

• None of these

How many students have 1 or 2 pets?

Does the following represent a random sample:

You want to know which store shoppers visit the most. You enter the toy store and survey 20 customers.

• Yes

• No

Is the following biased or unbiased sampling?

A phone-in survey is taken be a radio station to see how many listeners enjoy jazz in the morning.

• unbiased

• biased

Does the following represent a random sample:

You randomly chose 50 books from the school library to find the average length of each book

• Yes

• No

Does the following represent a random sample:

You ask 50 people in your local grocery store which grocery store is their favorite

• No

• Yes

Is the following biased or unbiased sampling?

10 students are randomly selected to participate in a survey about home computer usage

• biased

• unbiased

What is the difference between the enrollment in the college classes?

• 2 students

• 6 students

• 27 students

• 53 students

A bag contains letter tiles. The following tiles are in the bag: E, A, E, T, N, G, P, T, and E. Assume you will randomly draw out letters from the bag, without looking, and then replace the letter into the bag.

What is the sample space of this event?

• {A, E, G, N, P, T}

• {A, E, T}

• {E, T}

• {N, G, E}

A bag contains letter tiles. The following tiles are in the bag: E, A, E, T, N, G, P, T, and E. Assume you will randomly draw out letters from the bag, without looking, and then replace the letter into the bag.

What is the probability of choosing a vowel from the bag?

• 0 out of 9

• 2 out of 6

• 2 out of 9

• 4 out of 9