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The probability that a one-car accident is due to faulty brakes is 0.04, the probability that a one-car accident is correctly attributed to faulty brakes is 0.82, and the probability that a one-car accident is incorrectly attributed to faulty brakes is 0.03. What is the probability that
(a) a one-car accident will be attributed to faulty brakes;
(b) a one-car accident attributed to faulty brakes was actually due to faulty brakes?
Assume the probability that a telephone in any given telephone booth is defective is 0.2. Determine the probability that if 8 phone booths are examined, the number of defective phones is exactly 3.
Suppose a study is constructed to test a claim, at a 0.05 signifigance level that a population proportion is 40%. A simple random sample of 750 subjects has a proportion of 42%.
under a recent u.s. food and drug administration fda standard for food contaminants 3.5 ounces of tomato sauce can have
Develop 3 regression models to forecast selling price based upon each of other factors individually. Which of these is best?
Obtain b0 and b1 of the regression equation defined as y ^ = b0 + b1X and the coefficient of determination (r2) from the Excel regression output. Draw the fitted regression line on the scatter diagram.
Below are the sample times in minutes. At the .05 significance level, can we conclude that there is a difference in their mean times?
Over the last year the absentee rate at a large corporation averaged 8.2 days absent with a standard deviation of 6 days. One department with 40 employees had an absentee rate of 12 days per employee.
Problem: Sisters and brothers. How strongly do physical characteristics of sisters and brothers correlate? Here are data on the heights (in inches) of 12 adult pairs:12
Calculate the confidence intervals about a regression line. My data is log transformed and has high R-square value for what is called "power" equation in Excel. My CI's are narrow at the top of the graph and very wide near the bottom.
The self-service prices for a sample of 15 retail outlets during Labor Day weekend of 2007 in the detroit, michigan area. What is the arithmetic mean selling price?
Calculate the value of Cpk for each of the corkproduction processes described in the previous exercise, and comment. c. How do Cp and Cpk compare, and when are they equal?
In a sample of 210 members, 160 employees took all of their vacation days. Therefore, the test statistic is 1.38. When testing the executive's (using a 1% level ofsignificance), what is the pvalue?
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