Question 280898: Could you please help me to solve these two problems from statistic class
1 ) A 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 μ = 950 Grams at 10 Weeks of age. The Distribution of weights is normal with σ = 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. Identify the independent and the dependent variables for this study.
b. Assuming a two-‐tailed test, state the null hypothesis in a sentence that includes the independent variable and the dependent variable.
c. Using symbols, state the hypotheses (H0 And H1) For the two tailed test.
d. Sketch the appropriate distributions, and locate the critical region for α =.05.
e. Calculate the test statistic (z-‐score) For the sample.
f. What decision should be made about the null hypothesis, and what decision should be made about the effect of the hormone?
Answer by richwmiller(17219)   (Show Source):
You can put this solution on YOUR website! Besides being the rule for this website it is best to submit one problem per submission. You have a much better chance of getting your problems answered that way especially since your problems are very involved.
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