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In: Statistics and Probability

A random sample of 77 eighth-grade​ students' scores on a national mathematics assessment test has a...

A random sample of 77 eighth-grade​ students' scores on a national mathematics assessment test has a mean score of 264 with a standard deviation of 40.

This test result prompts a state school administrator to declare that the mean score for the​ state's eighth-graders on this exam is more than 260.

At a=0.09​, is there enough evidence to support the​ administration's claim? Complete parts​ (a) through​ (e).

Solutions

Expert Solution

Let denotes the mean score for the​ state's eighth-graders on this exam.

orchestra answered 9 months ago
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