Question

The mean test scores with standard deviations of four English classes are given below.

Class
Mean
Standard Deviation
Mrs. Jones
89
1.9
Mrs. Rijo
82
1.4
Mr. Phan
73
3.4
Mrs. Scott
90
6.1

Which statement is most likely to be true?
The scores of Mrs. Scott’s class are the closest to the class mean.
The scores of Mr. Phan’s class are the closest to the class mean.
The scores of Mrs. Jones’s class are the closest to the class mean.
The scores of Mrs. Rijo’s class are the closest to the class mean.

Answer 1

The closeness of the scores to the mean value is reflected through the values of the standard deviation. The smaller the value of standard deviation, the closer are the individual values to the mean. Therefore, since Mrs. Rijo's class has the smallest value for the standard deviation, her class has the closest individual score to the mean. The answer is the fourth choice. 

Answer 2

Answer:

Your answer is b!

Step-by-step explanation: