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An urn contains 14 red chips, 12 green chips, and 4 white chips. A chip is drawn and replaced, and then a second chip drawn. What is the probability of (a) a white chip on the first draw? (b) a white chip on the first draw and a red on the second? (c) two green chips being drawn? (d) a red chip on the second, given that a white chip was drawn on the first?
Indicate which would be the independent variable and which would be the dependent variable in each of the following:
Many retail stores offer their own credit cards. At the time of the credit application the customer is given a 10 percent discount on the purchase.
What is the standard deviation of the number of requests in a 10 hour work day? Give your answer to four decimal places.
Conduct a marketing experiment in which students are to taste one of two different brands of soft drink
A random sample of 85 group leaders and supervisors revealed that they worked an average of 6.5 years before being promoted. The population standard deviation was 1.7 years. Using the 0.95 degree of confidence, what is the confidence interval for ..
The length of pregnancies are normally distributed with a mean of 268 days and standard deviation of 15 days. How many days do 80 percent of women last until in their birthing process?
If it costs 1 cent to make a liver-flavored biscuit and 2 cents to make a chicken-flavored one, what is the optimal product mix for a package of the biscuits in order to minimize the firm's cost?
The standard deviation of test scores on a certain achievement test is 10.5. A random sample of 150 scores on this test had a mean of 72.8.
A sample of 60 students from a large university is taken. The average age in the sample was 22 years with a standard deviation of 6 years.
A sample of size n = 14 is selected from a normal population to construct a 95% confidence interval estimate for a population mean. The interval was computed to be (7.82 to 9.64). Determine the sample standard deviation.
The probability that house sales will increase in the next 6 months is estimated to be 0.25. The probability that the interest rates on housing loans will go up in the same period is estimated to be 0.74. The probability that house sales or intere..
You are thinking of employing a t-procedure to test hypotheses about the mean of a population using a significance level of 0.05.
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