Question 12

5pts

Which of the following survey results are most likely to include a bias due to sampling?

Group of answer choices

Mail survey to those who purchased a product from that company to determine customer satisfaction

Survey by Gallop organization of 1000 random US adults to represent US population

Customer comment card responses at a restaurant regarding their service

Poll taken by visitors of political organization website to estimate future election results

Phone survey done by university of alumni to represent opinion of alumni

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Question 13

5pts

When betting whether a coin will land on heads, you find that the coin has landed on tails the last four flips.Assuming this is a fair coin, should you increase the amount of your bet of landing on heads for the fifth flip?

Group of answer choices

No, tails is more likely on a fair coin

No, the probabilities do not change based on previous flips

Yes, on a fair coin, heads will be more likely

No, you should bet on tails given those previous results

Yes, as after four tails, a head is more likely the next outcome

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Question 14

5pts

To study the interest in sports of junior high kids, an organization focused on those kids being most active during the outside time of the day.Would you expect the results to be biased?Why or why not?

Group of answer choices

No, all active kids would be equally eligible to be in the sample

No, sports are universally of interest

Yes, the wording of the questions might push kids to a specific answer

Yes, as inactive kids may have different opinions from the others

No, as inactive kids likely feel the same as the active kids

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Question 15

5pts

When polling individuals about who they will likely vote for in the next election, what additional question should also be asked to avoid a biased sample?

Group of answer choices

Whether they plan to vote in the upcoming election

Their employment status

The location of their next planned vacation

The number of people in their household

Whether they voted in the last election

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Question 16

4pts

Often individuals get numbers stuck in their heads.If someone were accused of check fraud, how might statistics help identify if the digits used on the check values were random or not?

Group of answer choices

A frequency distribution where a random use of digits would result in a normal distribution

Use a hypothesis test where the null hypothesis was set equal to random

A frequency distribution where a random use of digits would result in a uniform distribution

A confidence interval where 5 was the middle

A regression with each digit set as an independent variable