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5. Sixto Sanchez is the owner of Suburban Stylists. He is evaluating the service level provided to walk-in customers. Because he is enrolled in an MBA program at Eastern University, Sixto decides to sample walk-in customers for the next two weeks. He collects information from 82 walk-in customers and calculates that their average waiting times that is 21 minutes with a standard deviation of 4 minutes. (12 pts) a) Determine the degrees of freedom to be used in further analysis. b) Calculate the two sided 95% confidence interval for the population mean of waiting times. c) Calculate the two sided 90% confidence interval for the population mean of waiting times. d) Calculate the two sided 99% confidence interval for the population mean of waiting times. e) What t table value should be used in calculating a two sided 95% confidence interval for the population mean of waiting times if the sample selected is 25 instead of 82?
Describes the theory the researchers explore
SPC is one of a number of tools which can be used to improve manufacturing quality standards - Outline two techniques which can be used to decide where to put SPC effort most effectively.
The purpose of this assignmentto test a student's expertise in developing an introduction and writing a review of related literature and developing research gaps that can be addressed by future studies
What are some of the main uses of a regression analysis
Do a literature review on the use of Poisson
For each of the following situations, would you prefer that your data value is a low outlier, high outlier, or the mean when compared to others' data values? Why? Provide reasoning. Use your knowledge of what the mean, low, or high outlier i..
1.multiple choice1 medical care and compensation costs for workers injured on the job vary and are strongly skewed. the
What proportion of customers say that they will return and rate the restaurant's food as good?
question 1 give illustrations of primary secondary and tertiary prevention that will be used to reduce the damage
Calculate the mean and standard deviation and Based on these statistics, describe how these anthropometric data compare to the US male and Chinese female populations.
a) Conduct a crosstabs analysis to examine the proportion of female high school students who take advanced math courses is different for different levels of the parent variable.
Psychomotor retardation scores for a large group of manic-depressive patients were approximately normal, with a mean of 930 and a standard deviation of 130. What fraction of the patients scored: a) between 800 and 1,100? b) less than 800? ..
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