1. An engineer wishes to determine the width of a particular electronic component. If she knows...

1. An engineer wishes to determine the width of a particular electronic component. If she knows that the standard deviation is 1.9 mm, how many of these components should she consider to be 90% sure of knowing the mean will be within ± 0.5 ± 0.5 mm? 7 40 24 19 142

2. A report says that the average amount of time a 10-year-old American child spends playing outdoors per day is between 20.24 and 24 minutes. What is the margin of error in this report?

3. If n=22, ¯xx¯ (x-bar)=46, and s=6, find the margin of error at a 99% confidence level (use at least three decimal places)

Expert Solution

orchestra answered 2 years ago

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