Lesson 23 Practice Quiz A

A career counselor at a high school surveys 5 groups of students about their plans after graduation. Each student chooses one plan. Each group is a random sample of 25 students. A total of 800 students are in the school.

The most likely plan among the students will likely be to _______________.

• get a job

• go to college

• learn a trade

• be a volunteer

A career counselor at a high school surveys 5 groups of students about their plans after graduation. Each student chooses one plan. Each group is a random sample of 25 students. A total of 800 students are in the school.

Approximately _____ of the students surveyed chose go to college.

• 33%

• 40%

• 44%

• 50%

A career counselor at a high school surveys 5 groups of students about their plans after graduation. Each student chooses one plan. Each group is a random sample of 25 students. A total of 800 students are in the school.

About _____ of the students in the entire school would be estimated to choose this plan.

• 264

• 320

• 352

• 400

A researcher at a fish hatchery takes three random samples of the same size from a population of 1,200 baby salmon.

In the first sample, 28% of the salmon are over 2 in. long

In the second sample, 32% of the salmon are over 2 in. long

In the third sample, 27% of the salmon are over 2 in. long

Based on the mean of the three samples, how many baby salmon in the population should the researcher expect to be over 2 in. long?

• 324

• 336

• 348

• 384

The owner of a company is ordering 675 T-shirts to give to her employees. She asks 75 employees selected at random what size they would like. Based on the data from the sample, decide whether the statement below about the number of each size T-shirt is true or false:

There should be 108 Small T-shirts ordered

• True
• False

The owner of a company is ordering 675 T-shirts to give to her employees. She asks 75 employees selected at random what size they would like. Based on the data from the sample, decide whether the statement below about the number of each size T-shirt is true or false:

There should be 200 Medium T-shirts ordered

• True
• False

The owner of a company is ordering 675 T-shirts to give to her employees. She asks 75 employees selected at random what size they would like. Based on the data from the sample, decide whether the statement below about the number of each size T-shirt is true or false:

There should be 261 Large T-shirts ordered

• True
• False

The owner of a company is ordering 675 T-shirts to give to her employees. She asks 75 employees selected at random what size they would like. Based on the data from the sample, decide whether the statement below about the number of each size T-shirt is true or false:

There should be 110 X-Large T-shirts ordered

• True
• False

A box contains 90 letter tiles used for a word game. Fourteen students each select a random sample of 20 letters from the box, count the vowels, and return the sample to the box. The dot plot shows their results.

The best estimate for the number of vowels in the box (rounded to the nearest whole number) is _____.

From the students in his school, Anthony selects three random samples of 40 students each and counts how many of the students are wearing shorts. The results are shown in the table.

Based on the results of Anthony's three samples, from (a)   to​ (b)   of the students in Anthony's school are wearing shorts.

• 70%
• 85%
• 73%
• 75%
• 80%