Q. 32
Question
The normal probability curve and histogram of the data are shown in figure; is known.
Perform Hypothesis test for mean of the population from which data is obtained and decide whether to use z-test, t-test or neither. Explain your answer.
Step-by-Step Solution
Verified Answer
z-test is used
1Step 1. Given Information
2Step 2. Consulting plots
Normal probability plot:
The distribution of the data is not approximately normally distributed because the points are not closer the line.
Histogram:
The distribution of the data is skewed to right with outlier.
3Step 3. Explanation
In this situation, the z-test should be appropriate because the population standard deviation known and sample size is large
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