Question

answer all these questions please with the right question number next to its letter

QUESTION 18

What is the appropriate number of classes for a frequency distribution with 200 observations (n)?

A		5
B		6
C		7
D		8

QUESTION 19

For salaries of $152,000, $148,000, $25,000, $156,000 and $151,000, the arithmetic mean would be an appropriate measure of central tendency to use.

A)True

B) False

QUESTION 20

In a positively skewed distribution, the mode is greater than the median.

A) True

B) False

Answer 1

( 1 )

Answer : Option ( D )

From strugges rule

# of classes = 1 + 3.322 log (N )

                    = 1 + 3.322 log (200 )

                    = 8.6 ~ 8

( 2 )

Answer ; True

Because there are no outliers

( 3 )

Answer : False

Because in positively skewed distribution, the mode is smaller than the median.