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The one-sample t statistic from a sample of n=25 observations for the two-sided test of
H0: u = 64Ha: u ? 64has the value t = -1.12
(a) Find the P-value for this testing using Table B (t distribution critical values chart). What conclusion would you draw at the 5% significance level? At the 1% significance level?
(b) Redo part (a) using an alternative hypothesis of Ha: u < 64.
On a recent prostate cancer screening test, Dale received positive results. It is known that this typescreening test will show 99% positive for people who have cancer
A diet is being developed which must contain at least 100 mg of vitamin C. Two fruits are used in this diet. Bananas contain 30 mg of vitamin C and Apples contain 20 mg of vitamin C. The diet must contain at least 100 mg of vitamin C. Which of the..
The heights of adults in one town have a mean of 66.3 inches and a standard deviation of 3.3 inches. What can you conclude from Chebychev's theorem about the percentage of adults in the town whose heights are between 59.7 and 72.9 inches..
You calculate the difference in income as (after incentive plan - before incentive plan). You want to test whether income after the incentive plan is different from income before the incentive plan. What are the hypotheses for this test?
Construct the 95% confidence interval for the proportion of students with at least one injury.
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Determine how large a sample should be taken to be 90% confident that the sample mean is within 0.12 ounces of the true mean weight of our bakery's loaves.
it is decided to measure the resistance of sheets of a certain metal at temperatures x of 100 k 200 k 300 k 400 k and
a researcher conducted an experiment on the effects of a new drug on depression. the researcher had a control group
describe the distribution of sample means shape expected value and standard error for samples of n36 selected from a
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