Calculate PART A PART B PART C: PART A: If n=14, ¯xx¯(x-bar)=50, and s=9, construct a...

Calculate PART A PART B PART C:

PART A: If n=14, ¯xx¯(x-bar)=50, and s=9, construct a confidence interval at a 99% confidence level. Assume the data came from a normally distributed population.

Give your answers to one decimal place.

< μμ <

PART B:

In a survey, 23 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a mean of $30 and standard deviation of $10. Find the margin of error at a 80% confidence level.

Give your answer to two decimal places.

PART C:

If n=28, ¯xx¯(x-bar)=31, and s=4, find the margin of error at a 90% confidence level

Give your answer to two decimal places.

Expert Solution

orchestra answered 2 years ago

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