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Count of their Kleenex use in diaries According to the Wall street journal report, the survey results left "little doubt that the company should put 60 tissues in each box." The number 60 was "the average number of times people blow their nose during a cold." (note: in 2000, the company increased the number of tissues packaged in a cold-care box to 70.)
From summary information provided in the wall street journal article, we constructed a data set that represents the results of a survey similar to the one described above. In the data file name Tissue, We recorded the number of tissues used by each of 250 consumers during a period when they had cold. We apply the hypothesis testing methodlogy presented in this chapter to this data set in several Statistics in Action Revisited example.
What are the hypotheses we would want to test for the Kleenex case?
(a) Find the median cost of houses at Coal City in 1988. (b) Find the modal selling price of houses at Coal City in 1988.
Calculate the control limits for a c chart when Ubar = 3.0%, n = 60, and you collect one sample per hour for 40 hours of production. (2 sets of control limits required, x bar and range)
We monitor the number of incoming calls into a doctor's office. Let X be the number of incoming calls between the hours of l pm and 2 pm and Y be the number of calls between l pm and 3 pm.
This morning the office you are monitoring has eight office visits on the schedule. What is the probability that:
LSAT scores are normally distributed, with a mean of 150 and s = 10.
Consider different types of qualitative data collection and analysis methods and the ways in which they can support business decision making and strategies.
Construct a time series plot. What type of pattern exists in the data? Compute the exponential smoothing forecasts for a = .2.
The data below shows the time to process an inpatient admission, before and after a system usage training session was given. The following hypotheses were formulated for this study.
Find the probability of winning jackpot?
In which of the following situations is bootstrapping (and other resampling methods) often used and Which of the following is a valid description of the bootstrapping method.
Determine the centerline and the upper and lower control limits for a 3-sigma mean control chart in which each sample consists of 4 cylinders
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?
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