Analyzing Data

Question 1

mean

Answer 1

the value obtained by dividing the sum of several quantities by their number; an average

Question 2

median

Answer 2

denoting or relating to a value or quantity lying at the midpoint of a frequency distribution of observed values or quantities, such that there is an equal probability of falling above or below it

Question 3

mode

Answer 3

the most common score of a frequency distribution of observed values

Question 4

Range

Answer 4

highest subtract the lowest score

Question 5

Interquartile range

Answer 5

when you divide the scores up into halves like we did for median, then halve again, you get quartiles

Question 6

Variance

Answer 6

the standard deviation squared

Question 7

Types of Association Statistics?

Answer 7

1. Lambda and uncertainty coefficient, used for nominal data (words)
2. Gamma/Somer’s D, used for ordinal data (ordered numbers or words, ex. Age categories, 20-29 is younger than 40-49, Likert scales)
3. Correlation coefficient, also called Pearson’s r, is used for interval (and ratio) data (has a true zero point, ex. Age in years, number of children, can never be negative)

Question 8

Types of Tests for statistical significance:

Answer 8

1. t-test
2. F statistic from an ANOVA
3. R2, the multiple coefficient of determination
4. Chi-square