Question: 3. Complete the statements: The width of the confidence interval is exactly twice that of the margin of error. When C increases from 90% to

3. Complete the statements: The width of the confidence interval is exactly twice that of the margin of error. When C increases from 90% to 98%, the width of the interval slightly When the interval increases, the precision One way to reduce the margin of error is to increase the 4. A random sample of the costs of repair jobs at a large muffler repair shop produces a mean of $127.95 and a standard deviation of $24.03. If the size of the random sample is 40, calculate the 90 percent confidence interval for the average cost of the repair at this repair shop. Show all steps including checking conditions, work, and interpretation

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