AP Stats Semester Review

The mean number of accidents a week at a company is 6.4 with a standard deviation of 1.5.  What proportion of weeks would you expect to have less than 5 accidents?

• 0.6915

• 0.1762

• 0.8238

• -0.93

The mean GPA of students in a course at UCDavis is 3.2 with a standard deviation of 0.3. What percent of students in the course have a GPA between  2.9 and 3.8? 

• 81.5%

• 47.5%

• 68%

• 95%

The z-score represents.....

• the amount of standard deviations a data value is above or below the mean.

• the percentile the data value is above or below the mean.

• the amount of standard deviations a data value is above or below the median.

• the percent the data value is above or below the mean.

Joanne's Z-score is -1.5.  What does this mean?

• She didn't take the test yet.

• She scored 1.5 standard deviations below the average.

• She did better than most people.

• No clue

Test has a mean of 40 and a standard deviation of 10. What is the percent of people that scored above 62?

• 1.39%

• 45.34%

• 98.41%

• 22.34%

What is the shape of the data?

• symmetrical

• skewed left

• skewed right

• bell curve

Identify the sampling method:

Every fifth person boarding a plane is searched thoroughly.

• SRS

• Stratified

• Cluster

• Systematic

• Voluntary Response

Identify the sampling method:

At a local community College, five math classes are randomly selected out of 20 and all of the students from each class are interviewed.

• SRS

• Stratified

• Cluster

• Systematic

• Convenience

Identify the sampling method:

A community college student interviews the first 100 students to enter the building to determine the percentage of students that own a car.

• SRS

• Stratified

• Cluster

• Convenience

• Voluntary Response

What is the median of the scores?

• 21

• 16

• 17

• 19