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According to industry specifications, the standard deviation of gasket thicknesses for a given application must be no more than 3 thousandths of an inch. In a random sample of 25 gaskets produced by one of the firms, the sample standard deviation is found to be 3.7 thousandths of an inch. Assuming the population of thicknesses is normally distributed, and using a 5 0.025, examine whether the firm could be in violation of the industry specification. Based on the chi-square table, what is the most accurate statement that can be made about the p-value for the test?
(DATA SET) Note: Exercises 13.62 and 13.63 require a computer and statistical software.
consider random sample from a populaion x that is exponentialhy distributed with parameter y. fxyye-yx for xgt0a
A graphical presentation may accomplish ALL BUT which of the following objectives? Illustrate the amount of variation in the data.
A chance sample of 50 families revealed an average or median of $112,000 and a standard deviation of $40,000. What is the standard error of the average or median?
Confidence Intervals and Chi Square
spencer motors sells automobiles and trucks. the firm makes a 280 profit for each automobile it sells and a 375 profit
A research team conducted a study of soft-drink preferences among residents in a test market prior to an advertising campaign for a new cola product.
Illustrate how critical values associate to the confidence interval using example variable. Explain how margin of error associates to confidence intervals and to ecology.
a new drug to treat high cholesterol is being tested by pharmaceutical company. the cholesterol levels for 27 patients
probability values based on normal distribution.the sony corporation produces a walkman that requires two aa batteries.
the student government association at southwestern state university wanted to demonstrate the relationship between the
Eagle airlines' planes hold only 15 people. Past records indicate that 20% of the people making a reservation do not show up. We will assume that all reservations are independent; that is each reservation is for one person and these reservations a..
What is a "Chi-Squared Test"? Provide a fully referenced explanation and provide a brief example on a Chi-squared test, fully referencing all sources of information.
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