chapter 2

Question 1

What is a resistant measure?

Answer 1

statistical measure that is relatively unaffected by large changes in numerical values of a small proportion of the observations in the distribution that the measure describes.

Question 2

What is the relationship between the mean and median if the distribution is symmetric?

Answer 2

they are equal

Question 3

What is a five number summary?

Answer 3

smallest observation, first quartile, median, third quartile, largest observation

Question 4

What is the IQR

Answer 4

interquartile range
IQR = Q3-Q1

Question 5

What is the relationship with IQR and outliers?

Answer 5

Call an observation a suspected outlier if it falls more than above the third quartile or below the first quartile

Question 6

What is the best summary for a distribution that is skewed or has strong outliers?

Answer 6

five number summary

Question 7

What is the best summary for a distribution that is symmetric and free of outliers?

Answer 7

mean and standard deviation

Question 8

Answer 8

B