Author Question: Exhibit 9-4The manager of a grocery store has taken a random sample of 100 customers. The average ... (Read 171 times)

ninaj · **on:** Mar 25, 2023

Question 1

Exhibit 9-3

n = 49	= 54.8	s = 28	H₀: μ 50
			H_a: μ> 50

Refer to Exhibit 9-3. The p-value is between

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0.01 to 0.025

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0.025 to 0.05

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.05 to 0.1

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0.1 to 0.2

Question 2

Exhibit 9-4
The manager of a grocery store has taken a random sample of 100 customers. The average length of time it took the customers in the sample to check out was 3.1 minutes with a standard deviation of 0.5 minutes. We want to test to determine whether or not the mean waiting time of all customers is significantly more than 3 minutes.

Refer to Exhibit 9-4. The test statistic is

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1.96

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1.64

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2.00

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0.056

marufp · **Reply #1 on:** Mar 25, 2023

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