A set of data consists of 38 observations. how many classes would you recommend for the frequency distribution

solution:

use 2 to the k rule:

2⁵ = 32

32 is less than 38,

so,

5 classes are not enough

try the next highest number:

2⁶ = 64

64 is greater than 38,

so,

the recommended number of class is 6.