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A Wendy's franchise has been averaging about $5000 worth of business on a typical Saturday with a standard deviation of σ = $500. The manager is concerned that sales are slipping, after taking into account the average value of sales for four consecutive Saturdays being $4800.
If we wanted to shorten the interval of the estimation of the true mean of Saturday sales to a width of $600 in total, what should the size of our sample be to achieve it?
Would you use a one-tailed or two-tailed test? Explain your response.
Report a table of marginal means for each level of each of the three factors.
Caselet on McDonald’s vs. Burger King - Waiting time
What does r 2 of .73 tell us? Is this a strong or weak correlation? How can you tell?
Compute the mean number and median number of apples in a bag.
Cores on two tests have a bivariate normal distribution; and that correlation of 2 scores is 0.8. Determine the probability that sum of the student's scores on 2 tests will be greater than 200?
Find out the finite population correction (FPC).With a population size of 1,000 and a planned sample size of 200, what is the finite population correction.
Last school year, student body of a local university consisted of 30% freshmen, 24% sophomores, 26% juniors, and 20% seniors. A sample of 300 students taken from this year's student body showed the following number of students in each classificati..
You are the production manager of a company. Parachutes are woven in your factory using a synthetic fiber purchased from one of four different suppliers. The most important outcome for parachutes is strength of the fabric.
What is the best prediction for the number of products sold based on advertising costs of $7000?
Carry out the suitable calculations to test for effect modification. Interpret your results.
What is the probability that none are a commercial success?
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