Statistics

Question 1

What is the formula for z-scores

Answer 1

Score - Mean / Standard Deviation

Question 2

How do you calculate the mean?

Answer 2

Sum of Scores / Number of Scores

Question 3

What are z-scores?

Answer 3

z-scores refer to the number of standard deviations above the mean

Question 4

What percentage of scores lie on one standard deviation of the mean?

Answer 4

68%

Question 5

What percentage of scores lie on two standard deviations of the mean?

Answer 5

95%

Question 6

What percentage of scores lie on three standard deviations of the mean?

Answer 6

99.7%

Question 7

How to find interquartile range?

Answer 7

Q3-Q1 = Upper Quartile - Lower Quartile

Question 8

Box Plots

Answer 8

https://www.simplypsychology.org/boxplots.html