Question 104 pts

A car company sells six models of cars. They would like study sales by car model (e.g. Camaro, Impala, etc.). Which graph would provide the most effective presentation?

Group of answer choices

Stem and leaf diagram

Pie chart

Bar chart

Scatter plot

Flag question: Question 11Question 114 pts

Thirty percent of the cars that come into our repair shop need an oil change. On Saturday, we expect 50 cars to come in. We want to determine the probability that at least 25 will need an oil change. What statistical method would we best to use?

Group of answer choices

Histogram

Binomial probability distribution

Conditional probability

Normal probability distribution

Flag question: Question 12Question 125 pts

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

Group of answer choices

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

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

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

Customer comment card responses at a restaurant regarding their service

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

Flag question: Question 13Question 135 pts

The renters in building A complain that their fees are too high compared with renters in other nearby buildings. Which of the following would NOT be a justification for the higher fees in building A?

Group of answer choices

Exercise room

Larger rooms in each apartment

Trash pickup day on Monday, rather than Tuesday

Guard at the front desk

Cleaning services available

Flag question: Question 14Question 145 pts

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 students who are in sports, are likely already in after-school activities

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

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

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

No, sports are universally of interest

Flag question: Question 15Question 155 pts

A poll in Alabama showed that 53% of people planned to vote for candidate A for President in an upcoming election. A national newspaper used that poll to say that 53% of the population of the United States planned to vote for candidate A. Why was this an inappropriate use of the Alabama poll results?

Group of answer choices

The sample was not large enough to draw that conclusion

People who participate in polls are unlikely to actually vote

The sample was only of Republican voters

Voters are too likely to change their minds

The population sampled was unlikely to reflect the entire population of the United States

Flag question: Question 16Question 164 pts

Imagine you read poll results that found that 49% of individuals liked buying food at movies, while 42% of individuals did not like buying food at movies. This poll had an error of +/- 2%. Based on this result, can one say that in the population, more people clearly like buying food at the movies?

Group of answer choices

Yes, as the confidence intervals for the two groups do not overlap

No, as the confidence intervals for the two groups overlap

No, as the poll results show most people do not like to buy food at the movies

Yes, as that had the higher percentage in the poll

No, as polls cannot reflect the population