## Answers

Let X be the weight of a randomly selected coin. X has a mean and standard deviation

The z-score of X=x is

a) Weights are considered significantly low if the z score is less than or equal to -2. Let be the value of low weight below which the weights will be considered significantly low. Using the z score of we get

Weights are considered significantly low if

ans: B) Weights are less than 5.34272 g

Weights are considered significantly high if its z score is greater than or equal to 2. Let be the value of high weight above which the weights will be considered significantly high.

Using the z score of to 2 we get

Weights are considered significantly high if

ans: B. Weights are greater than 5.58920 g

μ 5.46596

σ-0.06162

x-5.46596 0.06162 x-μ

We were unable to transcribe this image

We were unable to transcribe this image

5.46596 0.06162 S-2 ' 피 < 5.46596-2 × 0.06162 → x, < 5.34272

We were unable to transcribe this image

We were unable to transcribe this image

Th-5.46596 0.06162 、Zn > 5.46596 + 2 × 0.06162 →Th > 5.5892

.
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