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A quality control program is being developed for computer hard-drivers. The mean fraction defective in the samples for these in the past has been 3%. If there are 5 random samples, and a constant sample size of 400 is taken for each random sample, what is the upper control limit of P-Chart?
let x be the number of people in a household for a certain community. consider the following probability density for x
a population is estimated to have a standard deviation of 10. we want to estimate the population mean within 2 with a
A regression model between sales (Y in $1,000), unit price (X 1 in dollars) and television advertisement (X 2 in dollars) resulted in the following function: = 7 - 3X1 + 5X 2 For this model SSR = 3500, SSE = 1500, and the sample size is 18...
As a group, smokers tend to be somewhat older than nonsmokers, would the scientist be justified in her conclusion? Explain how the experimental design can be improved so that meaningful conclusions can be drawn.
1. Explain how modeling is used in decision analysis. What is meant by the term "requisite decision model"? 2. What role do subjective judgments play in decision analysis?
A mean of 68 years and a standard deviation of 3.5 years. Find the age at which payments have ceased for approximately 86% of the plan participants.
a manager of a pizza outlet has collected monthly sales in 000 data for some time in an attempt to predict sales for
A complete census taken at the university a few years prior indicated a mean age of 22.4 years with a standard deviation of 7.6 years. Test the null hypothesis at the .05 level.
Precisely (i.e., using specific numbers) what does central limit theorem tell us about sampling distribution of sample means for samples of this size from this population?
What is the probability that the next 100 customers will spend an average of less than $56 on dinner?
Large non-normal population with a mean of 10 and variance of 16, what would be the mean, variance, standard deviation and shape of the distribution of sample means? Give reasons for your answers.
the following is a cross-tabulation taken from a subset of the 2010 general social survey. respondents were asked
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