Variance of Random Variable

Question 1

What are the two types of data?

Answer 1

Group data & ungroup data

Question 2

Type of data given in intervals

Answer 2

Group data

Question 3

Type of data given as individual data points

Answer 3

Ungroup data

Question 4

3 measure of central tendency:

Answer 4

• mean
• median
• mode

Question 5

type measures of central tendency that describes the sum of all the values divided by the number of values in a set of data

Answer 5

Mean

Question 6

Type of measures of central tendency that describes the middle score in a set of data that is arranged in order (lowest to highest)

Answer 6

Median

Question 7

Type of measures of central tendency that describes the most frequent score in a set of data

Answer 7

Mode

Question 8

3 measures of variablity:

Answer 8

• range
• standard deviation
• variance

Question 9

Type of variablity that shows the difference between the largest and smallest value in a data set

Answer 9

Range

Question 10

Type of variability that shows tha standard difference between each data point and the mean

Answer 10

Standard deviation

Question 11

Type of variability that shows the average squared of the values from the mean

Answer 11

Variance

Question 12

μ

Answer 12

Population Mean

Question 13

X̄

Answer 13

Sample Mean

Question 14

x͂

Answer 14

Median

Question 15

Mo

Answer 15

Mode

Question 16

N

Answer 16

Population size

Question 17

n

Answer 17

Sample size

Question 18

σ

Answer 18

Standard deviation

Question 19

σ²

Answer 19

Variance