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The liquid chlorine added to swimming pools to combat algae has a relatively short shelf life before it loses its effectiveness. Records indicate that the mean shelf life of a 5-gallon jug of chlorine is 2,10 hours (90 days). As an experiment, Holdlonger was added to the chlorine to find weather it would increase the shelf life. A sample of nine jugs of chlorine had these shelf lives (in hours):
02, 1592,1702,1802,1792,1602,1672,1712,1812,185
At the .025 level, has Holdlonger increased the shelf life of the chlorine? Estimate the p-value.
A company has just manufactured 1295 CDs, and 492 are defective. If 10 of the CD's are randomly selected for testing, what is the probability of the entire batch will be accepted
What is the possibility that for a arbitrarily selected customer the service time could exceed 3 minutes?
What is the predicted GPA if a person watches 12 hours of television per week?
Would it be reasonable to conclude that the population mean is 63 pounds?
Compute the value of the sample correlation coefficient between weekly sales and shelf space. Is the correlation between weekly sales and shelf space significant at the .01 level of significance? What is the estimated regression equation?
A month of sales data are collected on sales of different types of computer products Run the t-tests to determine:
What is wrong with this design? What confounds could be leading to the results of improved memory and problem-solving skills?
What is the conditional probability of a manager in the Division of Community Services reporting workplace sexual harassment?
Determine the probability of selecting sample with a mean of more than $100,000 but less than $112,000.
Set up hypothesis and two-tailed decision rule for right mean using 5% level of significance. Hypothesis for a two-tailed decision is?
A random sample of 50 female CFO's and a random sample of 40 male CFO's are selected. Find the expected value of the sample mean difference.
CCI is unable to adjust the mean of the filling process. However, it is able to adjust the standard deviation of the filling process.
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