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For each of the 10 animals, researchers measured the metabolic cost of a feeding dive and a non-feeding dives. Based on the data, does feeding increase the metabolic costs of a dive?
He finished 1st seven times 2nd three times, and one time each in 6th, 9th, 12th 15th, 22nd, 37th. Find his median finishing position for the year. Assume that finishing position is a discrete varia
Runger and Pignatiello (1991) consider a plastic injection molding process for a part with a target critical width dimension of 100. Find the power of test to detect a change in the true mean width t
The above data are the differences in SAT scores obtained by a student before the training and after the training. What is this an example of?
Letting p1 and p2 be the proportion of all entering freshmen in 1988 and 1992, who graduated in the bottom third of their high school class? Using the above data, construct a 99% confidence interval
Construct a 95% confidence interval for the population proportion of people in Iowa with cholesterol levels over 200. Place your LOWER limit, rounded to 3 decimal places.
Test the data at the 5% level of significance. Give good statistical evidence. (ie., use the appropriate 4-part format). Give a 99% confidence interval for the difference in mean pulse rates.
Also, you might suggest what other information concerning the different types of errors might be useful to examine, and offer possible courses of actions.
Assume that the weights of the bags of potato chips are normally distributed. Find a 95% confidence interval for the mean weight of all such bags of potato chips.
Find two sample surveys on the same topic that seem to present conflicting conclusions. Investigate and explain why the results are different.
Find any article that fails to use statistical information properly. Explain the misuse, misrepresentation, or bias. Perhaps the author does not really understand the statistics and the misrepresent
Find a news article from a major national source that reports on an observational study. Does the article imply that the study establishes a cause-and-effect connection between variables studied?
What is the chance that none of the test patients will be nauseas after taking this drug? What is the chance that one and only one of the test patients will be nauseas after taking this drug?
What is S(1), the estimated probability of survival at one month? What is the estimated probability at 5 months? At 6 months? Construct a survival curve (do not submit) based on the product-limit esti
In a study of bladder cancer, tumors were removed from the bladders of 86 patients. Use the product-limit method to estimate the survival function in each treatment group.
Assume 50 random samples of the same sample size are taken from a population, and a 90% confidence interval is constructed from each sample. How many of the intervals would you expect to contain th
If the goal is to test whether less than 65% of the flights depart on time, what is the value of the calculated test statistic at the 5% level of significance?
What is the value of the test statistic for testing if there is evidence of a difference in the variabilities of the amount of time required to reach a customer service representative between the tw
X = value of currency held by all U.S. banks ($ millions), n = 100 years (1907 through 2006). This regression would most likely result in which outcome?
If you randomly choose a graduate of Morehouse, what is the probability this individual will have graduated with debt? What is the probability a student graduates from Pace without any debt?
For each design, specify and justify each of the four factors and calculate the estimated sample size you'll need. Give reasons for any parameters you need to specify for G*Power.
Assume that the result is a sample size beyond what you can obtain. Use the compromise function to compute alpha and beta for a sample approximately half the size.
Calculate the sample size needed given these factors one-tailed t-test with two independent groups of equal size. Assume that the result is a sample size beyond what you can obtain.
State the null and alternative hypotheses for each of the following: You want to show an increase in buying and selling of single-family homes this year when compared with last year's rate.
calculate the risk ratio, odds ratio and incidence rate ratio for the effect of regular excercise on osteoporosis in these women and provide a one-sentence interpretation for each result.