A school administrator is interested in purchasing a set of instructional aides

Question

A school administrator is interested in purchasing a set of instructional aides to supplement classroom instruction. However, before purchasing the instructional aides, she wants to make sure the scores of students from her school on a national standardized test would increase beyond 82 if the instructional aides are used. To assess this, she randomly chose 20 students to use the instructional aides and their scores on the national standardized test are given below. Can she conclude that the instruction aides significantly increase the average score from 82? On the basis of this research, would she be justified in purchasing the instructional aides?       

82       93       88       98       84       80       90       93       92       79

95       91       91       85       89       86       97       78       85       94

Explanation / Answer

Average of the above questions comes out to be 88.5 .

Since , average is greater than 82 , we can suppose that purchasing the instructional aides is justified

82 93 88 98 84 80 90 93 92 79 95 91 91 85 89 86 97 78 85 94 Average = 88.5

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