Business Statistics
1. Tíme spent serving a customer at a cafe is normally distributed, with \(\mu=7\) minutes and \(\sigma=1.8\) minutes.
(a) If you select a random sample of duration serving twenty-five ( 25 ) customers, determine the probability that the sample mean is between 6.8 and 7.2 minutes.
(b) If you select a random sample of 144 customers, determine the probability that the sample mean is between 6.8 and 7.2 minutes.
(c) Explain the difference in the results of (i) and (ii).
Homework Answers
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According to a social media blog, time spent on a certain social networking website has a...
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within problem d the first choice is either greater or less and the other two empty...
within problem d the first
choice is either greater or less and the other two empty spaces are
increasing and decrease as both choices
According to a social media blog, time spent on a certain social networking website has a mean of 19 minutes per visit. Assume that time spent on the social networking site per visit is normally distributed and that the standard deviation is 5 minutes. Complete parts (a) through (d) below. a. If you select a random...
According to a social media blog, time spent on a certain social networking website has a...
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According to a social media blog, time spent on a certain social networking website has a...
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within problem d the first
choice is either greater or less and the other two empty spaces are
increasing and decrease as both choices
According to a social media blog, time spent on a certain social networking website has a mean of 19 minutes per visit. Assume that time spent on the social networking site per visit is normally distributed and that the standard deviation is 5 minutes. Complete parts (a) through (d) below. a. If you select a random...
According to a social media blog, time spent on a certain social networking website has a mean of 20 minutes per visit. Assume that time spent on the social networking site per visit is normally distributed and that the standard deviation is 7 minutes. Complete parts (a) through (d) below. a. If you select a random sample of 25 sessions, what is the probability that the sample mean is between 19.5 and 20.5 minutes? (Round to three decimal places as...
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