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.

Standard deviation measures the closeness of a dataset to its mean.

The statement that is most likely true is (b) the scores from Mrs. Rijo's class are the closest to the class mean

The dataset is given as:

Class               Mean  Standard Deviation

Mrs. Jones      89            1.9

Mrs. Rijo          82            1.4

Mr. Phan         73              3.4

Mrs. Scott       90             6.1

So we can conclude that, the statement that is most likely true is (b) the scores from Mrs. Rijo's class are the closest to the class mean

Read more about mean and standard deviation at:

link

80 the answer is 80

step-by-step explanation: