CH 8 + Dillman 1-2

Question 1

Frequency Distribution

Answer 1

Presents the number and percentage of participants for each score on the variable

Question 2

Measures of Central Tendency

Answer 2

give an estimate of the center of the distribution; mean, median, mode

Question 3

Mean

Answer 3

the average of all the scores of the distribution; relatively stable, is more easily affected by extreme scores

Question 4

Median

Answer 4

divides a distribution in half, preferred when a distribution is highly skewed or asymmetrical

Question 5

Mode

Answer 5

the most frequentyl occurring score

Question 6

Measures of Dispersion

Answer 6

variability or the spread of the scores; range, variance, standard deviation

Question 7

Variance

Answer 7

the average squared distance of scores from the mean

Question 8

Standard deviation

Answer 8

the average distance of scores from the mean

Question 9

Range

Answer 9

the difference between the highest and lowest scores in a distribution

Question 10

Correlation Coefficient

Answer 10

provides a measure of the association between variables

Question 11

What are some of the issues to keep in mind regarding correlation?

Answer 11

1. Causation
2. Sample Size
3. Group Differences
4. Restriction of Range

Question 12

What are the four cornerstones of quality surveys?

Answer 12

Coverage Error, Sampling Error, Nonresponse Error, Measurement Error

Question 13

Coverage Error

Answer 13

Occurs when the list from which sample members are drawn does not accurately represent the population

Question 14

Sampling Error

Answer 14

The difference between the estimate produced when only a sample of units on the frame is surveyed and the estimate when every unit on the list is surveyed

Question 15

Nonresponse Error

Answer 15

The difference between the estimate produced when only some of the sampled units