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An urn contains 16 ball of which 5 are red. if we select 1 ball, what is the probability tha a red ball will be chosen? If we reandomly select 5 ball with replacement, what is the probability distribution of x-the number of red balls in the sample?
Find the most powerful predictor among the six independent variables using regression.
A survey on the drinking habits of Americans estimated the percentage of adults across the country who drink beer, wine, or hard liquor at least occasionally. Of the 1516 adults interviewed, 985 said that they drank.
Linda would like to maintain a 90% service level. what safety stock level do you recommend for BX-5?
A random sample of n = 4 scores is chosen from the population with µ = 80 and σ = 20. On average, how much difference would you expect between sample mean and population mean?
Compare the effectiveness of three methods of teaching (IV). You plan to administer a standardized test (DV measured on an interval scale measuring knowledge acquisition) to the students in three classes with each class using a different teaching ..
When we say we have confidence level of 95% what do you believe our "margin of error" is?
Bruce Kuhlman, owner of Kuhlman Farms, wishes to use brand of fertilizer which will produce maximum yield per acre of wheat. Mr. Kuhlman can select from four different commercial brands. Write down the hypotheses?
Computing the mean value for the given data - What is the new mean for the class and frequency distribution graph, what type of graph should be used
Create the indicated confidence interval for population mean using (a) t-distribution. (b) If you had incorrectly used normal distribution, which interval would be wider?
A random sample of 10 observations from one population revealed a sample mean of 23 and a sample deviation of 4. A random sample of 8 observations from another population revealed a sample mean of 26 and a sample standard deviation of 5.
Based on surveys conducted in 1989 and 1999, a researcher compared the proportion of high school age females interested in a career in science in 1989 with the proportion in 1999. He concluded that the proportions were not significantly different ..
You are testing the null hypothesis that there is no linear relationship between two variables, X and Y. From your sample of n=10, you determine that r=0.80.
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