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r= -0.84
mean mortgage amount = $151.9 milliommean interest rate amount = 8.88%mean mortgage amount =standard deviation = $23.86 million mortgage amountstandard deviation = 2.58% interest rate
what is the equation that predicts mortgage amount from interest rate? Compute the slope of the straight line
-compute the y-intercept of the straight line-determine the equation
What are differences between dependent and independent samples? Provide examples. What are the implications for determining the tests used to analyze data?
In a standard test for reaction time, female candidates for flight school are found to have times that are normally distributed with a mean of 0.65 seconds and a standard deviation of 0.15 seconds.
Assume that you choose a 50 families sample. Which is the form expected from the distribution of the average or median of the sample?
A nutritionist conducted an experiment on memory for dreams. She wanted to test whether it really was true that eating cheese before going to bed made you have bad dreams. Over three nights, the nutritionist fed people different foods before bed.
By using this data and incorporating seasonal effects, predict quarterly turnover for 2010.
The result for University X was a mean of 5 hours and an estimated population variance of 2 hours; for University Y; and for University Z. What should you conclude? Use the .05 level. What should you conclude? Use the .05 level.
Why is it important to know the standard deviation for a given sample? What do researchers learn about a normal distribution from knowledge of the standard deviation?
A flour manufacturer packs flour into paper bags, each of which is supposed to hold 10 pounds, or 160 ounces. Some customers have complained that the bags hold only 9.5 pounds, or 152 ounces.
The Department of Labor wants to estimate the percentage of females in the U.S. labor force to within ±5%, with 90% confidence. How many employment records should be sampled?
What is the expected number of customers that will have to wait more than 6 hours?
A normal population has a mean of 75 and a standard deviation of 5. You select a sample of 40. Compute the probability the sample mean is
Find the percentage of the total variation that cant explained by the linear relationship between the two variable.
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