descriptive statistics

Question 1

Descriptive Statistics

Answer 1

Values that describes the characteristics of a sample or population

Question 2

Inferential Statistics

Answer 2

Values that infer results of a sample to the population from which the sample is drawn

Question 3

Measures of Central Tendency

Answer 3

Mean (average)
Median (midpoint)
Mode (most frequently occurring number)

Question 4

Measures of Variability

Answer 4

Range
Variance
Standard Deviation

Question 5

Range

Answer 5

The difference between the largest and smallest variables

Question 6

Variance

Answer 6

How far the numbers are spread out

Question 7

Standard Deviation

Answer 7

How much variation exists from the average/mean

Question 8

Skewness

Answer 8

How symmetrical the distribution of the variable is

Question 9

Kurtosis

Answer 9

Peakedness or flatness of a distribution

Question 10

Shape

Answer 10

Includes modality, outliers

Question 11

Nominal Data

Answer 11

Data that categorizes (Gender, eye color, race, graduating cohort practice specialty)

Question 12

Ordinal Data

Answer 12

Data defined by an ordering, but the distance between the choices or values is not defined (preference scales, rankings)

Question 13

Continuous data

Answer 13

Data with numeric values; there are two types (interval and ratio)

Question 14

Interval data

Answer 14

Data with defined interval between the values, but with no true zero value

Question 15

Ratio data

Answer 15

Data with an absolute zero value, where zero means there is a total absence of what is being measured

Question 16

Bar Chart

Answer 16

Displays frequencies or proportions of categorical data (ordinal or nominal data)

Question 17

Histogram

Answer 17

Plots the frequencies or proportions of observations in a data set- interval, continuous, or ratio data

Question 18

Box and Whisker Plots

Answer 18

Shows the shape of a distribution and the presence of outliers

Question 19

Pie Charts

Answer 19

A chart that divides up a sample into proportions

Question 20

Scatter Plots

Answer 20

Shows relationship between variables; the closer the dots are in a scatter plot to forming a line, the stronger their association

Question 21

Survival Curve

Answer 21

Used to show the length of time until a bad event (i.e death)