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. The population standard deviation is known to be 0.5 minutes. We want to see if we can find significant evidence to prove that the

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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. The population standard deviation is known to be 0.5 minutes. We want to see if we can find significant evidence to prove that the mean waiting time of all customers is significantly more than 3 minutes.

MAYAY
(d) At the 0.5 level of significance, your critical value
is
multiple choice
1.96
2.03
1.69
1.645
(e) At the OS level of significance, can you
Conclude that the meaning waiting time is
3?
Significantly more then ??
yes
or
no
Transcribed Image Text:MAYAY (d) At the 0.5 level of significance, your critical value is multiple choice 1.96 2.03 1.69 1.645 (e) At the OS level of significance, can you Conclude that the meaning waiting time is 3? Significantly more then ?? yes or no
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