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Q1) Restaurateur Danny Valentine is estimating 2 sizes, Raymondville and Rosenberg, for his next restaurant. He wishes to prove that Raymondville residents (population 1) dine out more often than Rosenberg residents (population 2). Denny commissions market survey to test his hypothesis. Market researcher used random sample of 64 families from each suburb, and reported following x? 1 =15 times per month and x? 2 = 14 times per month. Suppose that σ 1= 2 and σ 2= 3. With α= .01, what does restaurateur Denny Valentine determine?
Q2) Researcher is interested in testing whether there are differences in mean between population one and population two. He arbitrarily chooses a sample of 9 items from population one resulting in the mean of 14.3 and standard deviation of 3.4. He arbitrarily chooses a sample of 14 items from population two resulting in the mean of 11.8 and standard deviation 2.9. By using a 10% level of significance what does business researcher determine? Suppose that populations have equal variances and are normally distributed.
Utilize a test of the difference among proportions when answering these questions. Illustrate the research hypothesis.
A group of students collected data at the Cedar Point amusement park and reported that the "wait time" to ride the "Top Thrill Dragster" roller coaster is consistently distributed within a range of 40 minutes to 90 minutes.
The hypothesis that the samples came from identical populations cannot be rejected, the T value is 16.5 greater that the lower limit.
Suppose it costs $25 per student for the administrators to provide the course materials.
Construct appropriate control charts for before and after introduction of the new pathway. Discuss process stability and the results.
Suppose the likelihood that any flight on Northwest Airlines arrives within 15 minutes of scheduled time is .90. We choose four flights from yesterday for study.
Based on the model N(1152,84) describing Angus steer weights, what are the cutoff values for.
The world record time (in minutes) in the marathon is plotted versus the year in which the record was set for men and women separately. The plotting symbol o is used for men and x for women. The data include only records set between 1908 and 1988.
At the .05 significance level, is there a difference in the proportion of viewers watching the three channels?
More than 13 successes in 19 trials with a 40 percent chance of success. (Round the answer to 4 decimal places.) Fewer than 7 successes in 15 trials with a 40 percent chance of success. (Round the answer to 4 decimal places.)
Determine the value of correlation coefficient between these 2 variables?
Create a scatterlpot of P_RFM and P_HELM. If drawing plot by hand, use graph paper to make sure accuracy. Be sure you label axes. After you have created the scatterplot, consider its form and direction. Recognize outliers, if any.
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