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Say a fast-food franchiser is considering building a restaurant in a local mall. According to franchise headquarters, a site is acceptable only if the number of pedestrians passing the location averages more than 100 per hour. A random sample of 40 hours produced a sample mean of 105 persons and a sample standard deviation of 12 persons. Do these data provide sufficient evidence to establish the site is acceptable at a 95% confidence level? Do the hypothesis test using a confidence interval and state a p-value.
Assuming these data are from two independent groups, calculate dfX, dfY, and dftotal for the data above. Determine the critical values for t based on the df you calculated for the question above, assuming a two-tailed test with a p level of 0.05.
Use frequency distribution to create a probability distribution, determine the (b) mean,(c) variance.
Assume a very large normally distributed population of scores on a test with mean 77 and standard deviation 7.
To test whether there is any association between two variables using Chi-Square test for independence.
Suppose 1.5 percent of the antennas on new Nokia cell phones are defective. For a random sample of 200 antennas, find the probability that:
Find the mean and standard deviation for the number of left-handed students in such classes of 25 students.
Determine the probability that employee will make 28 or more sales during 100-call shift? Allocate a Random Variable x.
Consider a worker-paced line with three process steps, each of which is staffed with one worker. The sequence of the three steps does not matter for the completion of the product.
You are the general marketing manager of Ford Motor company. The CEO of the company asked you to assess the viability of producing alternative fuel automobiles (ex, ethanol).
How does the efficiency of a regression predict the power of the t-test? How do robust standard errors change the comparison between hypothesis testing using OLS and robust regression? What does dependence in the e do to the t-test? what does non-no..
2 cards drawn from a 52 but before the second card is drawn you put the first one back and reshuffle the deck. Are the outcomes on the two cards independent and why?
List the simple events in the sample for this experiment. Assuming that each pair of city council members has an equal chance of being selected, assign probabilities to each simple event.
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