AP Statistics Unit 6 Review

Which of the following is not a part of the describing/comparing distribution process?

• Spread

• Center

• Shape

• Units

What do we call a numerical summary of sample data?

• Quartile

• Statistic

• Parameter

• Percentile

How do we determine an upper end outlier of a distribution?

• Mean + 3(IQR)

• Median +3(IQR)

• Q3 +1.5(IQR)

• Maximum - .5(IQR)

Which of the following do we not get in a boxplot?

• Median

• Maximum

• Minimum

• Mean

Which of the following is a specification of the normal distribution?

• Skewed Right

• Bimodal

• Symmetric

• Small Range

The "Emperical Rule" states that the normal distribution contains 99.7% of the data between how many standard deviations?

• 3

• 1

• 2

• 10

A researcher has gathered data about the number of soft drinks teenagers drink on a daily basis by taking a random sample of 1500 teenagers from around the world. We find that our data shows that the mean is larger than the median. What does this tell us about the shape of the distribution?

• skewed right

• skewed left

• uniform

• symmetric

If a distribution is skewed to the right, which of the following is true?

• The mean must be less than the median.

• The mean and median must be equal

• The mean is either equal to or less than the median

• The mean must be greater than the median

A small company that prints custom t-shirts has 6 employees, one of whom is the owner and manager. Suppose the owner makes $120,000 per year and the other employees make between $40,000 and $50,000 per year. One day, the owner decides to give himself a$30,000 raise. Which of the following describes how the company's mean and median?

• The median would increase by $6,000 and the mean would not change.

• The mean would increase by $5,000 and the median would not change.

• The mean and median would both increase by $5,000.

• The mean would increase by $6,000, but we cannot determine the change in the median without more information.

A sample of 99 distances has a mean of 22 feet and a median of 22.5 feet. Unfortunately, it has just been discovered that the minimum value in the distribution, which was erroneously recorded as 15 actually has a value of 10. If we make this correction to the data, then

• The median decreases, but the mean remains the same

• The median remains the same, but the mean is decreased

• The median increases, but the mean decreases

• The median stays the same, but the mean increases