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A national grocer's magazine reports the typical shopper spends six minutes in line waiting to check out. A sample of 16 shoppers at the local Farmer Jack's showed a mean of 5.1 minutes with a standard deviation of 2.8 minutes.Is the waiting time at the local Farmer Jack's less than that reported in the national magazine?Use the 0.02 significance level.
(a) What is the decision rule? (Negative amount should be indicated by a minus sign. Round your answer to 3 decimal places.)
Reject H0: µ ≥ 6 and fail to reject H1: µ < 6 when the test statistic is .
(b) The value of the test statistic is . (Negative amount should be indicated by a minus sign. Round your answer to 2 decimal places.)
(c) What is your decision regarding H0?
In each of the following cases. find the mean , variance and standard of the sampling distribution of sample proportion p.
Simplification by Factorization and finding domain-What happens when x is 6 or 3. What is the domain if x can only be 6 or 3?
Produce the summary output and give the estimated equation for your chosen model and find a suitable regression model to predict y2 using x2 as an explanatory variable. Comment on the output used and justify your choice of model.
Critically discuss the purpose of developing a frequency distribution? What is the relationship between the relative frequency and the cumulative frequency? Could a frequency distribution contain qualitative data? Why?
Suppose that the population of heights of male college students is approximately normally distributed with mean m of 68 inches and standard deviation s of 3.75 inches. A random sample of 16 heights is obtained.
A beverage company is trying to ?nd out the distribution of the breaking strength of their glass bottles. Fifty bottles are selected at random and tested for breaking strength, with the following results (in pounds per square inch):
After a certain candidate announced his intention for running for the premiership of a province, many polls were conducted to assess his chanced for success.
An experimental drug is administered to 30 randomly selected indivduals, with the number of individuals responding favorably recorded. Does this represent a binomial experiment.
Explain how you can use both T tests in your profession? Restate the research question into a null hypothesis: Does a memory-enhancing drug have an effect on the ability of a group of Alzheimer's patients.
Visa Card USA studied how frequently young consumers, ages 18 to 24, use plastic cards in making purchases. The results of the study provided the following probabilities.
A survey for Hotels asked respondents "When traveling internationally, do you generally venture out on your own to experience culture, or stick with your tour group and itineraries?" The survey found that 23% of the respondents stick with their t..
The guard agrees, and comes back later and tells A that he gave the pardon message to B. What are A's chances of being executed, given this information?
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