Formulas (Lecture 4-5)

Question 1

Sturge’s Formula

Answer 1

k = 1 + 3.322 x log(n)

Question 2

Class Width

Answer 2

cw = (Xmax - Xmin)/k

Question 3

Sample Mean Population (Ungrouped)

Answer 3

Mean

Question 4

Sample Mean Population (Grouped)

Answer 4

Mean

Question 5

Population Mean (Ungrouped)

Answer 5

Mean

Question 6

Population Mean (Grouped)

Answer 6

Mean

Question 7

Median

Answer 7

Median

Question 8

Mode

Answer 8

Mode

Question 9

Quartile (Ungrouped)

Answer 9

Quartile

Question 10

Quartile (Grouped)

Answer 10

Quartile

Question 11

Decile (Ungrouped)

Answer 11

Decile

Question 12

Decile (Grouped)

Answer 12

Decile

Question 13

Percentile (Ungrouped)

Answer 13

Percentile

Question 14

Percentile (Grouped)

Answer 14

Percentile

Question 15

Interpolation

Answer 15

Low + 0.x (High-Low)

Question 16

IQR

Answer 16

Q3 - Q1

Question 17

Range

Answer 17

Xmax - Xmin

Question 18

Sample Standard Deviation (Ungrouped)

Answer 18

SD

Question 19

Sample Standard Deviation (Grouped)

Answer 19

SD

Question 20

Population Standard Deviation (Ungrouped)

Answer 20

PSD

Question 21

Population Standard Deviation (Grouped)

Answer 21

PSD

Question 22

Sample Variance (Ungrouped)

Answer 22

SV

Question 23

Sample Variance (Grouped)

Answer 23

SV

Question 24

Population Variance (Ungrouped)

Answer 24

PV

Question 25

Population Variance (Grouped)

Answer 25

PV

Question 26

Karl Pearson’s Measure of Skewness

Answer 26

Sk

Question 27

Kurtosis

Answer 27

K