Statistics Review 1

The table shows the number of students enrolled in AP Courses at a high school by grade level and number of AP Courses. What fraction of students are taking 1 AP course?

• 88/310

• 16/310

• 16/88

• 88/300

The table shows the number of students enrolled in AP Courses at a high school by grade level and number of AP Courses. What fraction of 10th graders are not taking any AP courses?

• 72/310

• 72/136

• 72/100

• 100/310

The table shows the number of students enrolled in AP Courses at a high school by grade level and number of AP Courses. What fraction of students taking 2 or more AP courses are 12th graders?

• 40/310

• 86/310

• 40/102

• 40/86

The table shows the number of students enrolled in AP Courses at a high school by grade level and number of AP Courses. What fraction of students are 11th graders taking 1 AP course?

• 30/310

• 30/108

• 30/88

• 108/310

Roughly what percent of instrument players prefer classical music?

• 10%

• 30%

• 45%

• 60%

Is there an association between listening preference and instrument playing?

• Yes, because the distribution of instrument players is very similar to non-players.

• Yes, because the distribution of instrument players is different than non-players.

• No, because the distribution of instrument players is very similar to non-players.

• No, because the distribution of instrument players is different than non-players.

According to a 2021 poll, the percent of Americans choosing Thanksgiving as their favorite holiday was 19% +/- 2%. An interval of plausible values for the true proportion of Americans who would choose Thanksgiving as their favorite holiday is:

• (0.1862, 0.1938)

• (0.18, 0.20)

• (0.17, 0.21)

• (0.15, 0.23)

To decrease the margin of error of a poll, we could

• decrease the number of people surveyed

• increase the number of people surveyed

• take a random sample

• include outliers

To find out if a restaurant is good, check the Yelp reviews, which restaurant diners can write after eating. The reviews are an example of

• simple random sample

• voluntary response

• convenience sample

• nonresponse

A Chipotle manager interviews customers leaving the restaurant who look friendly to see how they enjoyed their meal. This is an example of:

• simple random sample

• voluntary response

• convenience sample

• systematic random sample