AP Stat Review

Match the following types of plots:

• Stem and Leaf 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.

• Segmented Bar Plot

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

  categorical variable.

• Box Plot

• Each data value is split

  into the first digit or digits and the last digit.

• Histogram

• A graphical representation of

  the five-number summary (minimum, first

  quartile, median, third quartile, maximum).

• Dot 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.

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

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

• right-skew

• above

• symmetric

• equal to

• left-skew

• below

Based on the Empirical Rule, make the following true:

​ (a)   of data is contained in one standard deviation from the mean.

​ (b)   of data is contained in two standard deviations below the mean.

​ (c)   of data is contained in three standard deviations above the mean.

• 68%

• 47.5%

• 49.85%

• 95%

• 99.7%

• 34%

The pth percentile is interpreted as the value that has p% of the data less than or equal to it. Put the following in percentile order:

• Q3

• Max

• Min

• Median

• 0%

Match the following:

• Conditional Distribution

• The row

  and column totals in a two-way table divided by

  the total for the entire table.

• Marginal Distribution

• A relative frequency for a specific part of the

  contingency table (e.g., cell frequencies in a

  row divided by the total for that row)

• Relative Frequency

• Cell divided by the total for the entire table

• Cumulative Frequency

• A count

• Frequency

• Represents the number or proportion of a data set less than or equal to a given number

Choose all correct answers: Measures the number of standard deviations a data value falls above or below the mean.

• Variance

• Standardized Score

• Probability

• Residual

• Z-Score

Suppose we toss a penny and a nickel. Let A be the event that the penny is a head and B be the event that the nickel is a tail. 
The events A and B are

• Disjoint

• complements

• independent

• dependent

The elements of a 5-number summary start at the beginning of the ​​range which is the ​ (a)   . The next part is the IQR​ which starts with ​ (b)   , has a bar for the ​ (c)   and ends with ​ (d)   . Finally this ends with the ​ (e)   . Outliers are marked by asterisks or other dots.

• minimum
• Q1
• median
• Q3
• maximum
• mean
• mode
• left skew
• right skew

This data is normally distributed. What percent of the data is in the shaded regions?

• 5%

• 95%

• 2.5%

• 50%