Question 1
A data set has mean 14 and standard deviation 2. Approximately 95% of the observations lie between ____ and ____ .
◦ 10, 18
◦ 10, 20
◦ 8, 20
◦ 12, 16
Question 2
A data set has 50 observations and has mean 55 and standard deviation 10. Approximately how many observations lie between 25 and 85?
◦ 34
◦ 35
◦ 48
◦ 50