Ch 4: Measures of Central Tendency

Question 1

What is Central Tendency?

Answer 1

Statistical measure representing the center or typical value of a dataset

Question 2

What is the Population Mean (μ)?

Answer 2

Average of all scores in a population

Question 3

What is the Sample Mean (X̄)?

Answer 3

Average of all scores in a sample

Question 4

What is the Median?

Answer 4

Middle score when data are arranged in order

Question 5

What is the Mode?

Answer 5

Most frequently occurring score

Question 6

What is the Nominal Scale?

Answer 6

Measurement level using categories with no natural order

Question 7

What is the Ordinal Scale?

Answer 7

Measurement level with ordered categories but unequal intervals

Question 8

What is the Interval Scale?

Answer 8

Measurement level with equal intervals but no true zero

Question 9

What is the Ratio Scale?

Answer 9

Measurement level with equal intervals and true zero

Question 10

What is Skewness?

Answer 10

Asymmetry in a distribution

Question 11

What is a Positive Skew?

Answer 11

Distribution with tail extending to right

Question 12

What is a Negative Skew?

Answer 12

Distribution with tail extending to left

Question 13

What is a Bimodal Distribution?

Answer 13

Distribution with two modes

Question 14

What is a Symmetric Distribution?

Answer 14

Distribution where both halves mirror each other

Question 15

What is an Outlier?

Answer 15

Extreme value in a dataset

Question 16

What is the Balance Point?

Answer 16

Point where distribution would balance (mean)

Question 17

What is the 50th Percentile?

Answer 17

Another term for median

Question 18

What is the Arithmetic Mean?

Answer 18

Sum of all values divided by number of values

Question 19

What is the Distribution Shape?

Answer 19

Overall pattern of how data are spread

Question 20

What is the Central Tendency Measures?

Answer 20

Collective term for mean, median, and mode