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12.26The march 14,2009, Boston Globe article "bargains on the menu-and a Side of Jitters" reported concerns that Resonant Week would not be well attended due to the economy this year. Local restaurants were coming up with special promotions to draw past and new customers. Keeping this in mind, a waitress wondered if the "reduced" prices would also "reduce" tip percentages-especially on the lower-cost promotions and midweek shifts. To test her hypothesis, she collected the following data. Percent TipAmount of Bill Tuesday Thursday Saturday($0- $29) 21 15 1219 17 1815 18 1919 14 13($30- $59 ) 17 1 1016 16 1422 18 2218 12 17($60- $89) 20 21 3114 19 2515 16 2424 15 30A. At the 0.05 level of significance, does the data provide sufficient reason to support that the day of the week had an effect on the percent tip received?B. At the 0.05 level of significance, does that date provide sufficient reason to support that the amount of the bill had an effect on the percent tip received?
A quality-control manager randomly selects 70 bottles of ketchup that were filled on S1 to assess the calibration of the filing machine. Determine the population study?
A random sample of 15 Golden Retrievers has an average weight of 66 lb. The percentile rank of this sample is: A.85. B.10. C.90. D.80. E.93.
Define mixed method research and describe its strengths. Provide an example of when it is appropriate to apply mixed method research in the human services field. Summarize how scientifically sound research supports the function of a human services..
A study of 25 graduates of four-year colleges by the American Banker's Association revealed the mean amount owed by a student in student loans was $14,381.
Find the 90% confidence interval for the mean number of peaches per tree. How many trees does she need to sample to be accurate within 10 peaches per tree?
Their probabilities for success on a single play are p for A and q for B, and successive plays are independent. Determine the probability that A wins the contest given that A plays first.
What does standard deviation measure? In looking at the standard deviations of the "with fireplace" and "without fireplace" selling prices, one is much larger than the other.
While in Paymor Hospital such exams were given in 110 out of 200 cases. In a left-tailed test for equality of proportions, the p-value is?
The instructor has "covered" Autocorrelation Function (ACF) and Partial Autocorrelation Function (PACF), but I have not yet grasped a full understanding.
Describe how to draw the sample as a cluster random sample, using flights as the cluster. Describe how to draw the sample as a systematic sample from these flights.
A vending machine that dispenses coffee into cups must fill the cups with 7.8oz of liquid. Before selling the vending machine to a college or business, the company tests the machine to be sure it is dispensing an average amount of 7.8oz of coffee.
Repeat this process 10 times or you can draw 10 samples simultaneously using StatTools. Make a histogram of the 10 values of sample means. You are constructing the sampling distribution of sample means. What is the center of your histogram?
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