Unit 2

Question 1

The pth percentile of a distribution is the value with p% observations less than or equal to it

Answer 1

Percentile

Question 2

Plots a point corresponding to the percentile of a given value in a distribution of quantitative data. Consecutive points are then connected with a line segment to form the graph

Answer 2

Cumulative Relative Frequency Graph

Question 3

Tells us how many standard deviations from the mean a value falls, and in what direction

Answer 3

Standardized Score (z-score)

Question 4

Models the distribution of a quantitative variable with a curve that is always on or above the horizontal axis and has area exactly 1 underneath it

Answer 4

Density Curve

Question 5

The point at which the density curve would balance if made of solid material

Answer 5

Mean of the Density Curve

Question 6

The equal-areas point, the point that divides the area under the density curve in half

Answer 6

Median of the Density Curve

Question 7

A symmetric, single-peaked, bell-shaped density curve

Answer 7

Normal Curve

Question 8

The distribution described by a normal curve

Answer 8

Normal Distribution

Question 9

In a normal curve, the rule that 68% of the data falls within one standard deviation, 95% falls within two, and 99.7% falls within 3

Answer 9

Empirical Rule

Question 10

The normal distribution with mean 0 and standard deviation 1

Answer 10

Standard Normal Distribution

Question 11

A scatterplot of the ordered pair for each of the individuals in a quantitative data set.

Answer 11

Normal Probability Plot