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Assume that a population is normally distributed with a mean of 100 and a standard deviation of 15. Would it be unusual for the mean of a sample of 3 to be 115 or more? Why or why not?
Can we conclude that there is a positive association between the size of the home and the selling price? Use the .05 significance level.
Perform pair wise comparisons of the treatment means by computing a Tukey simultaneous 95 percent confidence interval for each of the pair wise differences μ1 - μ2, μ2 - μ3, and μ2 - μ3. Which type of program content results in the worst mean bran..
A random sample of 200 people was taken. Sixty percent of the people favor President Obama. The 95% confidence interval for the true population of people who favor Obama is?
For the following data, determine whether or not right-hemisphere damage results in significantly reduced performance on the spatial skills task. Test with alpha set at .05 with one tail. The data are as follows:
The number of arrivals per minute at a bank located in the central business district of a large city was recorded over a period of 200 minutes, with the following results:
Test this conjecture with formal hypothesis test, by using a 5% significance level. Find out the p-value for hypothesis test.
Can researcher conclude that humidity has significant effect on eating behaviour? Use two-tailed test with a = 0.05.
A sample of approx 25 students enrolled in the university points out that X (bar) = $315.4 and s = $43.20.
How large a sample should be taken if the desired margin of error is?
Determine the minimum required sample size if you want to be 99% confident that the sample mean is within 2 units of the population mean given sigma = 7.8. Assume the population is normally distributed.
Which of the following(s) can be considered (a) variable(s)?
Formulate an appropriate hypothesis test to examine at the 10% level of significance whether the manager's worries are justified.
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