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BST. Many dairy cows now receive injections of BST, a hormone intended to spur greater milk production. After the first injection, a test herd of 60 Ayrshire cows increased their mean daily production from 47 pounds to 61 pounds of milk. The standard deviation of the increases was 5.2 pounds. We want to estimate the mean increase a farmer could expect in his own cows.
a) Check the assumptions and conditions for inference.
b) Write a 95% confidence interval.
c) Explain what your interval means in this context.
d) Given the cost of BST, a farmer believes he cannot afford to use it unless he is sure of attaining at least a 25% increase in milk production. Based on your confidence interval, what advice would you give him?
suppose x has an exponential distribution with mean equal to 10. determine followinga px gt 10b px gt 20c px gt
A arbitrary sample of 8 students is selected. Illucidate the probability that among the students in the sample at least 7 are female.
It does not matter, when data are skewed mean and median are the same.
As part of a health study, a researcher wants to know the average daily intake of vitamin E for the typical adult. Suppose that for n = 12 adults, the intake is found to be- 450, 12, 52, 80, 600, 93, 43, 59, 1000, 102, 98, 43- Estimate the squared ..
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a particular manufacturing design requires a shaft with a diameter between 19.88 mm and 20.018 mm. the manufacturing
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Determine what would happen to your critical value (Z) if you were to change the level of significance (a) from .05 to .1 in a two tailed hypothesis test.
If the population standard deviation is σ.2 years, compute the standard error both with and without the finite population correction factor. What is the rationale for ignoring the finite population correction factor whenever n/N=.05?
The City Transit Authority plans to hire 8 new bus drivers. From the group of 100 qualified applicants, of whom 55 are men and 45 are women, 8 names are to be selected by lot. Suppose that Mary and John Lewis are among the 100 qualified applicants..
Create an operations plan for your NAB company using the template in the text as a guide (p. 214 |Operations Plan Preparation Form ). Extract appropriate information from the NAB Company portfolio, where applicable. Other required items in the tem..
Suppose that X1,..,Xn form a random sample from the normal distribution with unknown mean M and unknown standard deviation S, and let m and s denote the MLEs of M and S. for the sample size n=17, find a value of k such that P(m > M +ks) = 0.95
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