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About 6% of the population has a particular genetic mutation. 600 people are randomly selected.
Find the standard deviation for the number of people with the genetic mutation in such groups of 600.
A recent study indicated that 29% of the 100 women over age 55 in the study were widows. If no estimate of the sample proportion is available how large should the sample be?
What is the probability that a randomly selected household with a head of household in this age group had less than $70 000 in life insurance coverage?"
The nature of the hypothesis being tested, and the appropriateness of the statistical procedures employed in that test. You may illustrate your points using the tests you conducted.
The following is the number of minutes to commute from home to work for a group of automobile executives.
an airline claims that 65 of its flights depart on time. a sample of 100 flights was examined and it was determined
Discuss why the independent t-test is called independent. What does this analysis have to do with variance within and between groups?
Formulate the null hypothesis and the alternative hypothesis.
A medical doctor wishes to test the claim that the standard deviation of the systolic blood pressure of deep sea divers is less than 450. To do so, she selected a random sample of 20 divers and found s = 432.
How accurately do the exam scores predict final grades? Compute the standard error of the estimate.
What are the key conceptual differences between these 3 methods? In other words, under what conditions do we choose each method for our analysis, and why?
A population of scores forms a normal distribution with a mean of 40 and a standard deviation of 12. What is the probability of randomly selecting a score less than x=34?
The resulting equation for the line of best fit is given below, with x being observed for values between 10 and 200. If a production run was scheduled to produce 80 units, what would you predict the cost per unit to be in dollars?
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