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An independent rating service is trying to determine which of two film-developing shops has quicker service. Over a period of 12 randomly selected times, the average waiting period to develop a 24-exposure roll sold at Speedy Development is 58 minutes with standard deviation 3.5 minutes. The average waiting period at the Shutterbug to develop a 24-exposure roll over a period of 8 randomly selected times is 53 minutes with standard deviation 4.9 minutes. Using a 1% level of significance, can we say that there is a difference in the average waiting time between the two shops? Find the critical value(s).
An experiment involves rolling a fair six-sided die repeatedly. How many times must the die be rolled for a {6} to result at least once with probability greater than or equal to 0.6 ?
Find the critical value for t and determine the null and alternate hypothesis.
The annual precipitation amounts in certain mountain range are normally distributed with a mean of 88 inches, and a standard deviation of 10 inches.
Developing a linear programming problem using Commuter Bus scheduling to minimize the total cost.
Evaluate z statistic for the Wilcoxon rank sum test, standard deviation for the Wilcoxon rank sum test and P-value for the Wilcoxon rank sum test
10 people taste wine A and wine B, X= denote the number prefer A. Assume that all others prefer B. These people random sample..
Does drug have significant effect on aggression? Use an alpha level of .05, two tails.
What is the probability of receiving more than three pieces of junk mail today?
At one excavation site 8641 pot shards have been found that not yet been cleaned and identified. What is the probability that:
Develop a linear regression model for these data and forecast carpet sales if 30 construction permits for new homes are filed.
The probability that student pilot passes the written test for a private pilot's license is 0.7. Find the probability that the student will pass the test: (a) on the third attempt (b) before the fourth attempt.
Ski Resorts of Vermont, Inc. is considering a merger with Gulf Shores, Inc. of Alabama. The board of directors surveyed 50 stockholders concerning their position on the merger.
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