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In testing of a new production method, 18 employees were randomly selected and asked to try the new method. The sample mean production rate for the 18 employees was 80 parts per hour. The sample standard deviation was 10 parts per hour. Construct the 90% confidence interval estimate for the mean production rate for the new method.
an insurance sales representative sells policies to 5 men all of identical age and in good health. according to the
Do we have to worry about confounding variables in this instance? Why? If so identify a possible confounding variable? Are either of the terms retrospective study or prospective study relevant? Explain.
Suppose that in a population of 10 items, 3 are defective and 7 are not. Suppose that two items are chosen at random for inspection. Let X be the number of defective items inspected. report all probabilities to a minimum of 5 decimal places of acc..
a screening test which measures the level of a prostate speific antigen psa is a commonly used tool for the detection
Determining whether or not the proportion of the population in favor of Candidate A is significantly more than 80%. The value of the test statistic and the p-value respectively are?
Find the probility that a randomly selected student has neigther credit card. Find the probability that a randomly selected student has a Mastercard or a Visa or both.
Girls are needed to ensure that a 95% confidence interval estimate for the differncein mean BMI between boys and girls has a margin of error not exceeding 2 units?
a garage door opener has six toggle switches each with three settings up center and down. how many settings are
one of dotcoms products has a width dimensional specification of 1.488 plusmn .005 inches. the process is in
The Price water house Coopers Human Capital Index Report indicated that the average cost for an American company to fill a job vacancy during the study period was $3,270. Sample data similar to that used in the study are in a file entitled Hired.
Read "In the Matter of BJ's Wholesale Club, Inc., FTC File No. 042 3160, June 16, 2005, Agreement Containing Consent Order" at www.ftc.gov/opa/2005/06/bjswholesale.htm.
a linear regression was done to relate systolic blood pressure to weight measured in pounds. the resulting regression
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