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A bank branch uses an improved process for serving customers during 12-to-1 p.m. The waiting time, in minutes (defined as the time the customer enters the line to when he/she reaches the teller window), of a sample of 15 customers during this hour is recorded over a period of one week as: 9.66 5.90 8.02 5.79 8.73 3.82 8.01 8.35 10.49 6.68 5.64 4.08 6.17 9.91 5.47
a. Compute mean, median, Q1, and Q3. b. Compute variance, standard deviation, range, interquartile range, CV, and minimum and maximum Z scores. Are there any outliers? Explain. c. Are the data skewed? If so how?d. As the customer walks into the branch office during lunch hour, he asks the branch manager how long he can expect to wait. The branch replies "Almost certainly less than five minutes." On the basis of results of (a) through (c), evaluate the accuracy of this statement. had waiting time greater than 5 minutes, so the customer is likely to experience more than 5 minutes waiting time. The manager overstated the bank's service record while replying the customer)
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Choose the correct conclusion regarding the claim that the weights of statistics text vary more than the weights of text in general.
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Fairfield homes is developing two parcels near Pigeon Fork, Tenn. In order to test different advertising approaches, they use different media to reach potential buyers.
A sample of n=20 has a mean of M = 40. If the standard deviation is s=5, would a score of X= 55 be considered an extreme value? Why or why not?
If the sports report begins at 11:10, what is the probability that he misses part of the report if he waits until grading is done before turning on the TV?
Researchers routinely choose an alpha level of 0.05 for testing their hypotheses. What are some experiments for which you might want a lower alpha level (e.g., 0.01)? What are some situations in which you might accept a higher level (e.g., 0.1)?
Identify the sensitivity ranges for the profit of a sausauge biscuit and the amount of saisage available. Explain these sensitivity ranges
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Average time it takes males to complete a baccalaureate degree in the California public university system. Using the summary data below from the two samples, compute the value of the test statistic t*.
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