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A distribution of values is normal with a mean of 80 and a standard deviation of...

A distribution of values is normal with a mean of 80 and a standard deviation of 22. From this distribution, you are drawing samples of size 34.

Find the interval containing the middle-most 36% of sample means:

Enter answer using interval notation. In this context, either inclusive or exclusive intervals would be acceptable. Your numbers should be accurate to 1 decimal places. Answers obtained using exact z-scores or z-scores rounded to 3 decimal places are accepted.

Math   Statistics-And-Probability   
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Answer #1

From Z-table, Lookup for Z-value corresponding to area 0.32 to the left of the normal curve.

From Z-table, Lookup for Z-value corresponding to area 0.32 to the right of the normal curve.

The interval containing the middle-most 36% of sample means:

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