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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 the true mean for Saturday sales is now $4500, what is the probability of accepting the (false) null hypothesis in (a) above (the probability of not sharing the manager's concern because of lack of evidence)?
The Minitab output for the Tukey Least Significant Difference multiple comparisons is below. Which means are different and similar
Describe a business situation that you have had or might face that will benefit from the use of confidence intervals?
Assume the arrival of these emails i3 approximated by the Poisson distribution.
It was reported that 20 readers responded and 87% said "no" while 13% said "yes." Recognize 4 major flaws in this survey.
Assume the researcher's rats can be considered an SRS from the population of all laboratory rats. The mean Math SAT score of these students is found to be 560, 80 points higher than the national average.
Given that both balls selected are white what is the probability that bowl 3 was selected?
If the probability that it will rain tomorrow is 0.33, then what is the probability that it will not rain tomorrow?
When is it important to have matched pairs rather than two independent sets of data?
Establish a 99% Confidence interval about the difference in the proportion of the town voters and county voters who favor the proposal.
200 people were surveyed and asked to rate mayor Michael Bloombergs effectiveness towards education. The rate scale is 1 (lowest) to 10 (highest). Mayor Bloomberg's average rating was 7.50, with a standard deviation of 2
Find the sample size for the 95% confidence interval used to estimate the population proportion.
Reading highway signs is not always easy, especially if your vision is imperfect. Vision in general tends to deteriorate with age. Two researchers conducted a study to determine if the distance at which a standard highway sign could be recognized ..
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