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In a study to determine whether counseling could help people lose weight, a random sample of 24 people experienced a group-based behavioral intervention, whcih involved weekly meeting with trained interventionists for a period of six months. Fro this sample, the mean weight lost was 18.65 pounds with a standard deviation of 8.82 pounds. At the 0.05 significance level, test the claim that the mean weight loss is more than 15 pounds. The data approximately fit a normal distribution.
Below is a plot of the Olympic gold medal winning performance in the high jump (in inches) for the years 1900 to 1996.
If the manufacturer sells the parts in packages of 10 parts, what are the mean and standard deviation of the numberof useable parts in a package?
What is the relevance of Pearson's r? What does it tell you about the correlation between variables? What is one example of a null hypothesis and the research hypothesis that goes with it?
The Kruskal-Wallis rank test is a nonparametric replacement - The Wilcoxon rank sum test tests a null hypothesis
At 1 excavation site 8641 pot shards have been found that have not presently been cleaned also identified. Define the probability.
the behavior of series of components play a huge role in scientific and engineering reliability problems. the
Prepare an analysis of how you developed your instrument. The survey instrument is supposed to determine the level of self confidence in the participant.
an electrical engineer is reporting one the results for a process that manufactures high-voltage supplies with a
Suppose that that download time is normally distributed with a standard deviation of 0.2 seconds. What is the probability that a download time is less than 1 second?
A leasing firm claims that the mean number of miles driven annually, m, in its leased cars is less than 13280 miles. A random sample of 150 cars leased from this firm had a mean of 12584 annual miles driven.
A doctor advices a patient to go on a particular diet for 2 weeks. Considering the general condition of the patient, the amount of weight the patient may loose is assumed to be between 5 Kg and 10 Kg,
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.
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