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researcher would like to test the effectiveness of a newly developed growth hormone. The researcher knows that under normal circumstances laboratory rats reach an average weight of u= 950 grams at 10 weeks of age, The distribution of weights is normal with a standard deviation of 30. A random sample of n=25 newborn rats is obtained, and the hormone is given to each rat. When the rats In the sample reach 10 weeks old, each rat is weighed. The mean weight for this sample is M=974.
a. Sketch the appropriate distribution, and locate the critical region for the alpha level =.05.
For the most recent year available, the mean annual cost to attend a private university in the United States was $20,182. Assume the distribution of annual costs follows the normal probability distribution and the standard deviation is $4,400.
Find the probability of winning jackpot?
Survey on What do you think is the biggest problem facing education today. One problem with exit polls may be that the wrong "key precincts" were chosen.
Discuss the assumptions of this model. Specifically, how does each variable affect demand? How do the variables influence each other? What limitations might this model have? How can it be improved?
Fred received the following scores for his gymnastics routine: 8.5, 7.8, 8.0, 6.8, 7.1, 7.6. To figure out his score, the judges drop the highest and lowest score and then average the rest of his scores.
Marconi Shipping Company packages their shipments in 50 ton containers. History has shown that the shipping department reports that the distribution of container weights follows the normal distribution
Illustrate that probability distribution of X satisfies properties of a discrete probability distribution.
What value is business research and hypothesis testing to a company? How long should it take a company to complete a scientific research study?
Distances from the past year and carry out a hypothesis test for its suspicion. State the null hypothesis and the alternative hypothesis that it would use for this test.
Prepare an ANOVA table and test the null hypothesis of no linear relationship between the two variables.
Listed below is the rate of return for one year. Using the .05 significance level is it reasonable to conclude that the mean rate of return is more than 4.50%?
Assume that a hand of 12 cards is dealt from a normal deck of 52 playing cards. What is the probability that of the 12 cards, 3 will be diamonds, 3 will be clubs, 3 will be spades, and 3 will be hearts.
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