Class 1: Frequency Table

Question 1

Complete listing with values for characteristics (sample)

Answer 1

Array

Question 2

Smallest and greatest values

Answer 2

Class limits

Question 3

Equal and non-overlapping segments, generally 5 to 15

Answer 3

Class intervals

Question 4

Between the intervals

Answer 4

Class boundaries

Question 5

Number of observations in each segment

Answer 5

Class frequency “f”

Question 6

Representation of frequency

Answer 6

Tally (III)

Question 7

Percentage of cases in the intervals

Answer 7

Relative frequency

Question 8

Percent of individuals having a measurement less of equal to upper boundary of class interval

Answer 8

Cumulative relative frequency (cumulative %)

Question 9

Sum of all observations divided by number of observations

Answer 9

Mean

Question 10

As much observations below as above/middle number (average of two middles if there is an even number of observations)

Answer 10

Median

Question 11

Observation that occurs most frequently (nonexistent if every observation is different)

Answer 11

Mode

Question 12

Two modes exist

Answer 12

Bimodal

Question 13

How far the values are from the average

Answer 13

Measures of variation

Question 14

Difference between two extremes (xmax - xmin)

Answer 14

Range

Question 15

Average deviation of all observations from the mean

Answer 15

Mean deviation

Question 16

On average, s tells us that observations fall s units from the mean (square root of variance)

Answer 16

Standard deviation

Question 17

Smaller standard deviation means

Answer 17

More homogenous distribution

Question 18

Sum of squares of each deviation from mean divided by sample size minus 1

Answer 18

Variance

Question 19

The standard deviation s divided by the absolute value of the mean x-bar, bultiplied by 100 to get a percentage (ratio of standard deviation to the absolute value of the mean expressed as a percentage)

Answer 19

Coefficient of variation (cv)