Module 11 Review

Consider the sampling method described: from a production run on 15,600 LED monitors, every 120th is tested. Which sampling method best describes this scenario?

• convenience sample

• simple random sample

• stratified random sample

• systematic random sample

To gather information about the favorite type of music of middle school students, Kenya asks everyone in her 7th grade science class what type of music they like to listen to most often. Which sampling method best describes the scenario?

• convenience sample

• simple random sample

• stratified random sample

• voluntary response sample

On a social networking app, an amusement park asked all of its followers to vote on their favorite park attraction. The results are shown in the table. Based on the results, the amusement park infers that the most popular attraction is rollercoasters. This sampling method can be described as a __________ sample.

• convenience

• simple random

• systematic random

• voluntary response

On a social networking app, an amusement park asked all of its followers to vote on their favorite park attraction. The results are shown in the table. Based on the results, the amusement park infers that the most popular attraction is rollercoasters. This sampling method can be described as a voluntary response sample that is __________.

• biased

• unbiased

A quality control engineer for a light bulb company tests every 75th light bulb in a production run. He finds that 1 in 100 bulbs tested did not meet the quality control standards. He concludes that 1% of the light bulbs in the production run do not meet the standard. The sampling method can be best described as a ______________ sample that is unbiased.

• convenience

• simple random

• stratified random

• systematic random

A quality control engineer for a light bulb company tests every 75th light bulb in a production run. He finds that 1 in 100 bulbs tested did not meet the quality control standards. He concludes that 1% of the light bulbs in the production run do not meet the standard. The sampling method can be best described as a systematic random sample that is _________.

• biased

• unbiased

A quality control engineer for a light bulb company tests every 75th light bulb in a production run. He finds that 1 in 100 bulbs tested did not meet the quality control standards. He concludes that 1% of the light bulbs in the production run do not meet the standard. The sampling method can be best described as a systematic random sample that is unbiased. The inference drawn by the quality control engineer is __________.

• valid

• not valid

A food truck owner is ordering ingredients for their grand opening weekend. In order to determine how much is needed, he conducts a survey of 75 randomly selected potential customers asking which item they are likely to order. The results are shown in the table. The owner expects to have 400 customers over the weekend. Based on the survey results, predict the number of burritos that will be sold.

• 18

• 75

• 96

• 100

A grocery store conducts a random survey of its customers and finds that 78% would sign up for a rewards program if it were offered. If the rewards program is rolled out this weekend and there are 1,550 customers, how many of them would you expect to sign up for the program?

• 341 customers

• 429 customers

• 1,145 customers

• 1,209 customers

A video game store offers 3 types of rentals: new release, recent release, and classic. Store workers survey every 10th customer about their preferred rental. The table shows the results of the survey. If the store owner expects to have 1,250 rentals next month, how much profit can the owner expect to earn from recent release game rentals?

• 13

• 50

• 325

• 1235