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You wish to test the claim that u > 11 at a level of significance of ? = 0.05 and are given sample statistics n = 50, sample mean = 11.3 and standard deviation = 1.2 Compute the value of the test statistic. Round your answer to two decimal places
A contingency table has 5 rows and 4 columns. How many degrees of freedom are there?
In a hypothesis test for the population variance, the alternate hypothesis is the population variance doesnot equal 17.0. The significance level to be used is 0.05 and the sample size to be taken is 25. The tablevalue(s) to use from the chi-square di..
Use the Empirical Rule to estimate the proportion of costs within two standard deviations of the mean. What are these limits?
Assume the distribution of amounts purchased follows the normal distribution. For a sample of 50 customers, answer the following questions. What is the likelihood the sample mean is at least $25.00?
While in July the mean high temperature is 74oF and the standard deviation is 8oF. In which month is it more unusual to have a day with a high temperature of 55oF?
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 industrial engineer who is studying the clerical staffing of a physicians group practice must decide whether
Prof Hardtack gave three exams last semester in a large lecture class. The standard deviation = 7 was the same on all three exams, and scores were normally distributed.
The national sporting goods association conducted a survey of persons 7 years of age or older about participation in sports activities the total population in this age group was reported at 248.5 million with 120.9 million male and 127.6 million f..
A research study reports t(14) = 2.17. How many individuals participated in the study? Is this t statistic sufficient to reject the null hypothesis using a two-tailed test with alpha = 0.05?
The probability density of the net weight in ounces of a packaged compound is f(x)=2.0 for 19.75
Create a histogram over five class intervals.
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