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Creek Ratz is a very popular restaurant located along the coast of northern Florida. They serve a variety of steak and seafood dinners. During the summer beach season, they do not take reservations or accept "call ahead" seating. Management of the restaurant is concerned with the time a patron must wait before being seated for dinner. Listed below is the wait time, in minutes, for the 25 tables seated last Saturday night.
28
45
39
44
23
65
67
61
37
27
24
56
40
34
51
64
50
25
29
a. Explain why the times are a population.
b. Find the mean and median of the times.
c. Find the range and the standard deviation of the times.
If student is chosen at random, determine the probability that he or she is sophomore and owns a credit card.
Use this information to compute a 95% confidence interval for average number of credit cards carried by students.
Plot the control limits for the mean outside diameter and the range.
Each scenario involves randomly selecting n i observations from four, independent, Normal populations as described.
Determine x-bar and s for this data set. You may suppose the values for bulb life are normally distributed. Use traditional method to make your decision.
Create a scatter plot for those data. Based on scatter plot, how would you explain relationship between the two variable.
Assume that x has a normal distribution, with the specified mean and standard deviation. Find the indicated probabilities.
Dr. Richmond, a psychologist, is studying the daytime television viewing habits of college students.
Formulate the hypotheses that can be used to test the validity of the brokerage firm executive's claim.
If the sum of the squared deviations about the regression line is SSE = 40.0, what is the coefficient of determination?
The width of a confidence interval will be:
One measure of the overall sampling error in the entire distribution of sample means is the
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