Unit 2 - Module 7

Question 1

Statistics

Answer 1

tools that help us see and interpret what the unaided eye might miss

Question 2

Descriptive Statistics

Answer 2

numerical data used to measure and describe characteristics of groups; includes measures of central tendency and variation

Question 3

Histogram

Answer 3

bar graph depicting a frequency distribution

Question 4

Measure of Central Tendency

Answer 4

a single score that represents a whole set of scores

Question 5

Mode

Answer 5

most frequently occurring score(s) in a distribution

Question 6

Mean

Answer 6

arithmetic average of a distribution

Question 7

Median

Answer 7

middle score in a distribution

Question 8

Skewed Distribution

Answer 8

representation of scores that lack symmetry around their average value

Question 9

Data Variation

Answer 9

how similar or diverse the scores are

Question 10

Range

Answer 10

difference between highest and lowest scores

Question 11

Standard Deviation

Answer 11

computed measure of how much scores vary around the mean score

Question 12

Normal Curve

Answer 12

(normal distribution) symmetrical, bell shaped data; most scores fall near the mean and fewer near extremes

Question 13

Inferential Statistics

Answer 13

numerical data that allow one to generalize; infer from sample data the probability of something being true in a population

Question 14

Statistical Significance

Answer 14

statistical significance of how likely it is that an obtained result occurred by chance; reliable sample averages and a large difference of averages cause it to be statistically significant

Question 15

Practical Significance

Answer 15

if the difference is large enough to be important, it has practical significance

Question 16

Z-Score

Answer 16

(score - mean) / standard deviation