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A market researcher collects a simple random sample of customers from a population of over a million? customers that use a home improvement website. After analyzing the? sample, she states that she has? 95% confidence that the mean? time customers spent on? that website per day is between 18 and 53 minutes. Suppose that the population mean? time customers spent on that website is 21 minutes a day. Does this value of the population mean help to show that the confidence interval estimate is? correct?
Explain the linkage that a JIT inventory system provides between the purchasing and production functions. What are the implications for quality?
An automobile manufacturing plant produced 29 vehicles today: 9 were sedans, 11 were vans, and 9 were trucks. Plant managers are going to choose two of these vehicles for thorough inspection. The first vehicle will be chosen at random, and then ..
Determine the percentage of samples of size 16 that will have mean monthly expenditures on food within $ 18 of the population mean expenditure of? $370.
A cold and flu study is looking at how two different medications work on sore throats and fever. Analyze the data and explain which one would be the better medication for both a sore throat and a fever
How are air cargo rates calculated? Calculate the cost of international air transportation for the following shipment: 200 cartons of fine jewelry weighing a total of 2,500 pounds. The carton dimensions are 18 in by 12 in by 12 in (L × W × H). The..
Given the following sample information, test the hypothesis that the treatment means are equal at the .05 significance level.
the manager of a youth-oriented clothing store at the local mall has determined that 27 of the males who enter the
What is a null Hypothesis vs. Alternate Hypothesis, One Tailed Test vs Two Tailed Test - how do we know when to use what?
Comparing the experimental and theoretical probabilities, can you say the die used in this experiment is a fair die? Why or why not?
If 23 percent of all patients with high blood pressure have bad side effects from a certain kind of medicine, find the probability that among 120 patients
Calculate the probability distribution for the family size lived in by individual people. Describe the shape of this distribution.
The variance of the population of individuals is 400 and there are 25 individuals in each sample. What is the standard deviation of the mean?
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