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Two cars leave towns 1000 kilometers apart at the same time and travel toward each other. One car's rate is 14 kilometers per hour less than the other's. If they meet in 5 hours, what is the rate of the slower car?
A coin is tossed 20 times. A person, who claims to have ESP is asked to predict the outcome of each flip in advance. She predicts correctly on 14 tosses.
Determine the most likely outcome? Are events "alcohol involved" and "2 or more vehicles involved" mutually exclusive? Describe your reasoning.
The hypothesis that the samples came from identical populations cannot be rejected, the T value is 16.5 greater that the lower limit.
A random sample of 64 services is selected. What is the probability that the sample of 64 will have a mean service time greater than 114 minutes.
Standard deviation of 23.8 days. What is the 90% confidence interval for the average days worked by employees in all payroll departments?
14 machines are planned to be used for a 60-day production run for a customer. The operating time is 1660 hours. Upon failure, a machine must be returned to the manufacturer for repair.
1.an experiment tests the effects of new devices to help stop smoking. they tested hypnosis nicotine gum nicotine patch
A monthly report to the Texas Department of Health, division of Water Hygiene, contained the following water production data in thousands of gallons:
Sample data are reported for 50 employees of small companies, 75 employees of medium companies, and 100 employees of large companies.
Let X be normally distributed random variable with μ = 100 and σ = 10. Find the probability that X is between 75 and 100.
Suppose the waiting time at a restaurant is normally distributed with a mean of 12 minutes and a standard deviation of 6 minutes.
Ask 20 men thier weight and use excel to calculate the mean. test the hypothesis that the mean is not 172 pounds at the .10 significance level.
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