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Question: A large discount store gives its sales personnel bonuses based on their average sale amount. Since each salesperson makes hundreds of sales each month, the store management decided to base average sale amount for each salesperson on a random sample of the person's sales. Since records of sales are kept in books, the use of systematic sampling is convenient. Suppose a salesperson has made 855 sales over the month, and management wants to choose a sample of 30 sales for estimation of the average amount of all sales. Suggest a way of doing this so that no problems would result due to the fact that 855 is not an integer multiple of 30. Give the first element you choose to select, and explain how the rest of the sample is obtained.
She gathers a sample of 35 subjects with depression and obtains a sample mean of 7.82 micrograms/100 ml. What are the null and alternative hypotheses for this study?
Must the company replace old truck? If so which of new trunks must they use? Describe in detail.
Explain how a pie chart can be constructed. If a data value had relative frequency r, at what angle would the lines defining its sector meet?
The Ohio Department of Agriculture tested 203 fuel samples across the state in 1999 for accuracy of the reported octane level. For premium grade, 14 out of 105 samples failed
Write a 700- to 1,050-word essay (not counting title or reference page material) about the topic you chose in Week 1. Incorporate at least two research sources.
A student writing a term paper used ordinary least squares in fitting a simple linear regression; model to some time series data containing positively auto correlated errors, and found that the· 90 percent confidence interval for ß1 was too wide t..
Suppose that we generate a random sample from a given distribution. If it is desired that the probability that the sample mean will be within 2 standard deviations of the mean of the distribution is at least .99, how large should the sample size b..
you are considering buying a new house in a new city. you want to know the average price of the houses in a new
Using the data in table 2 of Schneider et al, estimate the probability that a respondent with the following characteristics will be a PTA member:
indicates that the data provides a strong evidence against the null hypothesis. So reject the null hypothesis." - but what is H0 that we are rejecting?
Let x = number of the ball obtained on any selection. Then the probability distribution for x is given by:
The owner hypothesizes that his patrons have no preference for a particular court. He observes how many people play on each court on a particular day.
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