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The Student Recreation Center wanted to determine what sort of physical activity was preferred by students. In a survey of 53 students, 37 indicated that they preferred outdoor exercise over exercising in a gym. They estimated the proportion of students at the university who prefer outdoor exercise as (0.5745, 0.8217), with 95% confidence. Which of the following is an appropriate interpretation of this confidence interval?1) We are 95% confident that the proportion of students surveyed who prefer outdoor exercise is between 0.5745 and 0.8217.
2) We are 95% confident that the proportion of exercise time which the average student spends outdoors is between 0.5745 and 0.8217.
3) We are 95% confident that the proportion of all students at the university who prefer outdoor exercise is between 0.5745 and 0.8217.
4) We cannot determine the proper interpretation of this interval.
5) We are certain that 95% of students will be between 0.5745 and 0.8217.
A sample of ten ER patients was conducted to determine their average wait time and to compare this to the target wait time. The hospital wants to make sure that patients do not wait more than 35 minutes. Test following hypotheses using a 95% con..
An automobile insurance company estimates the following loss probabilities for the next year on a $25,000 sports car:
At the .05 significance level, is the number of units produced on the afternoon shift larger?
Sample mean is 50, t-statistic is 1.96, and standard error of sample mean is 2. Determine the 95 percent confidence interval?
Using data provided, test if there is a difference between means at alpha =.05.
Random sample of 64 services is selected. Assume the population consists of 400 services. Find out the standard error of mean.
Find out the regression equation Determine the value of Rsquare? Comment on value.
Produce the scatter plot for sodium and bp. Do you think there are any outliers?
The only difference is that the first group is comprised of athletic persons and the second of non-athletic ones.
Estimate with 90% confidence the difference in the level of satisfaction with service between the two branches.
Suppose a product must go through a sequential assembly line made up of ?ve operations. The time it takes to complete each operation is normally distributed with a mean of 180 seconds and standard deviation of 5 seconds.
Computation of Expectation, Variance and Covariance.Calculate the variances of Y1 and Y2.
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