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1. In the previous exercise there were two possible outcomes; reject the null hy- pothesis or fail to reject the null hypothesis. Explain in your own words what is meant by these outcomes. 2. Test the hypothesis that a normally distributed population has a mean blood glucose level of 100 (u 2 = 100). Suppose we select a random sample of 30 in- dividuals from this population (X- = 98.1, S2 = 126).
a. What is the hypothesis set (null and alternative) for a two-tailed test?
b. Find the estimated s.e.m.
c. Find the Z statistic.
d. What decision should we make, i.e., reject or fail to reject H0 at the CY = 0.05 level; reject or fail to reject H0 at the CY = 0.01 level?
e. What type of test is preferable to run in this situation, exact or approxi- mate? Explain your answer.
suppose a regession analysis provides the following results bus04.0 bsub10.0 ssubb0-1.0 ssubb14.0 sst67.36 sse50.0 and
A candy bar manufacturer is interested in trying to estimate how sales are influenced by the price of their product. To do this, the company randomly chooses 6 small cities and offers the candy bar at different prices.
At.01 significance level, can we conclude that 30-year mortgage rate for small banks is less than 6%? Evaluate the p-value.
A recent article in the Arizona Republic indicated that the mean selling price of the homes in the area is more than $220,000. Can we conclude that the mean selling price in the Goodyear, AZ, area is more than $220,000? Use the .01 significance le..
How many dieters must be surveyed if we want to be 95% confident that the sample mean weight loss is within 0.25 pound of the true population mean? Assume that the population standard deviation is known to be 10.6 lb.
Political polls typically sample randomly from the U.S population to investigate the percentage of voters who favor some candidate or issue. The number of people polled is usually on the order of 1000.
question the data displayed below represents the electricity cost during a recent month for a random sample of 50
What is the probability that the debt for a borrower with good credit is more than $18,000?
Solve following for x, expressing answers as compound fractions and integers where appropriate:
The width of the interval without the finite population correction factor is wider than the confidence interval with the finite population correction factor.
the journal of research in crime and delinquency has published a study on the situational characteristics of crimes. in
How many comparisons are lost in the development of the autoregressive model and how many parameters do you need to estimate? Which of the orginal 40 values do you need for forecasting and state the model?
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