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Question :
Is there a statistically significant difference between the bowling averages of male nurses and those of businessmen, if last year's league play produced the following data: 10 male nurses averaged 180 with s=10 and 15 businessmen averaged 170 with s=10. Use level of significance of 5%.
Identify the null hypothesis, alternative hypothesis, test statistic, P-value or critical conclusion about the null hypothesis and final conclusion that addresses the original claim.
How many participants would be required to ensure that a 95% confidence interval for the mean difference in the number of drinks is within two drinks of the true mean? Assumed that the standard deviation of the difference in the mean number of dri..
Given the following frequency distribution, find out the mean, variance, and standard deviation.
If X and Y are two independent Poisson random variables, then show that the conditional distribution of X given X+Y is binomial.
A random sample of stipends of teaching assistants in economics is listed below. Is there sufficient evidence at the alpha=.05 level to conclude that the average stipend different from $15,000? The data is listed below:
The gambler is paid later as follows, depending on the number of winners he picked. What is his expected gain? Remember, a loss is a negative gain, and that the bookie keeps the gambler's $20.
What is the best first glance prediction you can give the customer about the value of his house given your 2 variable linear regression analysis?
Pedestrian Walk Buttons New York City has 750 pedestrian walk buttons that work, and another 2500 that do not work (based on data from "For Exercise in New York Futility, Push Button
Make a pie chart or other indicator that expresses the market position of your fictitious IS business in terms of its top five products or services.
The null hypothesis is that the distribution of mother's educational level is the same for both treatment groups. The value of the chi-square statistic is 7.422. Evaluate the P-value
Use exponential smoothing to forcast Aug. income. Assume that the initial forecast for Feb. is $65,000. The smoothing constant selected is x=0.1
If you were using the relative frequency of an event to estimate the probablility of the event, would it be better to use 100 trials or 400 trials according to the law of large numbers?
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