Question

among 320 randomly selected airline travelers, the mean number of hours spent travelling per year is 24 hours and the standard deviation is 2.9.

what is the margin of error, assuming a 90% confidence level? round your answer to the nearest tenth.

now assume a 95% confidence level. without performing any calculations, complete the sentence below.

the margin of error for a 95% confidence level will be

Explanation:

Identify given parameters

Using the Margin of Error Calculation knowledge point

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$$

Calculate the 90% margin of error

Using the Margin of Error Calculation knowledge point

$$
LATEXBLOCK1
$$

Analyze the effect of confidence level

Using the Confidence Level Relationship knowledge point

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$$

Answer:

Question 1

Among 320 randomly selected airline travelers, the mean number of hours spent travelling per year is 24 hours and the standard deviation is 2.9.

What is the margin of error, assuming a 90% confidence level? Round your answer to the nearest tenth. <blank>0.3</blank>

Question 2

Now assume a 95% confidence level. Without performing any calculations, complete the sentence below.

The margin of error for a 95% confidence level will be <blank>greater than the margin of error for a 90% confidence level</blank>.