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Study of the effects of exercise used rats bred to have high or low capacity for exercise. There were 8 high-capacity and 8 low-capacity rats. The 8 high-capacity rats had mean blood pressure 89 with standard deviation 9, and the 8 low-capacity rats had mean blood pressure 105 with standard deviation 13. Using table C of your textbook (without additional software) what is the margin of error for a 95% confidence interval for the difference of the two means (low capacity - high capacity)? (Answer to the nearest hundredth.)
What is the total amount spent on consumer goods?
For each lettered part, a through c, examine the two given sets of numbers. Without doing any calculations, decide which set has the larger standard deviation and explain why. Then check by finding the standard deviation by hand .
What is the expected number of Republicans who will win office in the coming election?
If random samples, each with n = 4 scores, are selected from a normal population with MK = 80 and o=10
Create a 95% confidence interval for mean cost of repairs. Interpret this interval.
Use population distribution to determine expected juror frequencies. Test researcher's claim at a = 0.01.
Determine the probability that particular call lasted between 110 and 180 seconds?
The following data represent the cost of electricity for the period of July 2008 for a random sample of 50 one-bedroom apartments in a large city.
Finding the probability selecting a defective item from a collection of items using tree diagram
The hypotheses are as follows: Null Hypothesis: μD ≤ 0, Alternative Hypothesis: μD > 0. From her data, the resesarcher calculates a p-value of 0.0162. What is the appropriate conclusion? The difference was calucated as (after - before).
Fitting of simple linear regression equation - Given the student population for a school district over the past few years, find the prediction equation for this data.
Use a calculator or appropriate computer software to verify that, for the preceding data, xbar = 5.1.
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