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A poll of 93 students found that 29% were in favor of raising tution to build a new math building. The standard deviation of this poll is 4%. What would be the standard deviation if the sample size were increased from 93 to 187?
What is the probability that the debt for a borrower with good credit is more than $18,000?
Analyze whether or not patients undergoing this treatment are illustrating significant change from baseline to 3 months afterward. Report a p-value.
Sampling variability refers to the idea that different samples will include different individuals
At the .05 level of significance, is there convincing evidence that the number of absences per employee has increased?
Assuming that the population variances are equal for male and female Grade Point Averages (GPAs), use the following sample data to test whether the averages are different at the 0.05 level of significance.
Generate a testable null statistical hypothesis and an alternative statistical hypothesis. Select an alpha level of .05, .01, or .001 and justify your choice.
Standard deviation of 10.6 points. The lower 5% of the class will not get a passing grade. Find the score that separates the lower 5% from the rest of the class.
The Sony corporation produces a Walkman that requires two AA Batteries. The mean life of these batteries in this product is 35.0 hours. The distribution of the battery lives closely follows the normal probability distribtion with a standard deviat..
What is the chance that stock will fall by more than 15% next month? What extra assumption are you making when replying this question?
For the following independent random samples, use the z-test and the 0.01 level of significance in testing Ho:u1 = u2 versus H1:u1 = u2.
A random sample of 500 participants was recruited for the study ? Subjects were allowed to elect to participate in an 3-month exercise program or serve as a control subject (190 chose the program, 310 chose to serve as controls)?
If there are 81 fraternity members, how much should they buy so that using the normal approximation they are 93.32% sure they will not run out?
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