AP Statistics

We are given a distribution that is symmetric, what measure of spread should we use?

• Mean

• IQR

• Mode

• Standard Deviation

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

• Spread

• Center

• Shape

• Units

Doctors often compare someone's height and weight to worldwide or nationwide averages. If doctors were to convert the height measurements from feet to inches, how would the center and spread change?

• The center would not change, but the spread would change.

• The center would change with the conversion factor as well as the spread.

• Neither center nor spread would change.

• The center would change, but the spread would not.

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 local office manager is gathering data about each of the employees and their work necessities. Which of the following is a quantitative variable?

• iOS or Windows preference

• iPhone or Android preference

• Hours worked each month

• Genre of music listened to most

Match the following types of plots:

• Histogram

• Each data value is split

  into the first digit or digits and the last digit.

• Stem and Leaf Plot

• Represents each observation by

  a dot, with the position on the horizontal

  axis corresponding to the data value of that

  observation, with nearly identical values

  stacked on top of each other.

• Segmented Bar Plot

• The height of each bar shows

  the number or proportion of observations that

  fall within the interval corresponding to that

  bar. Altering the interval widths can change the

  appearance of the histogram.

• Dot Plot

• A graphical representation of

  the five-number summary (minimum, first

  quartile, median, third quartile, maximum).

• Box Plot

• Examples of bar graphs for one categorical variable, broken down by categories of another

  categorical variable.

When the majority of the data is to the right of the graph and there are outliers to the left, the graph is ​ (a)   . Therefore the mean is ​ (b)   the median.

• left-skew

• below

• right-skew

• symmetric

• equal to

• above