For the scores below, using the preferred class interval size of 15, determine the most appropriate class interval size for each range of scores.

a. 1 through 45

b. 72 through 136

c. 43 through 237

d. 0.12 through 0.38

Determine approximately the number of resulting classes if:

a. A class interval of 5 is used for a range from 1 through 55.

b. A class interval of 5 is used for a range from 172 through 366.

c. A class interval of 3 is used for a range from 88 through 124.

d. A class interval of 10 is used for a range from 12 through 160.

Indicate the class boundaries for the following class limits:

a. 56 through 58:to

b. 25% through 75%:% to%

c. 0.28 through 0.30:to

For the following distribution, indicate the class boundaries (compute to the first decimal)______, frequency_______, and cumulative frequency______for the interval of 56-68.

Scores: 56, 51, 47, 58, 55, 52, 53, 52, 49, 55, 54, 53, 47, 51, 57, 49, 50, 50, 48, 56, 58, 47, 57, 51, 54, 57, 49, 56

For the following distribution, indicate the class boundaries (compute to the first decimal), frequency, and cumulative frequencyfor the interval of 53-55.

Scores: 56, 51, 47, 58, 55, 52, 53, 52, 49, 55, 54, 53, 47, 51, 57, 49, 50, 50, 48, 56, 58, 47, 57, 51, 54, 57, 49, 56