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The following data are the one-year return to investors in world stock investment funds, as published in Pensions & Investments.11 The data are in percent return (%): 35.9, 34.5, 33.7, 31.7, 27.5, 27.3, 27.3, 27.2, 27.1 25.5. Assume these data constitute a random sample of such funds, and use them to test the claim that the average world stock fund made more than 25% for its investors during this period.
Each of four tasters picks one coffee anyway (not knowing which is which, because the coffee is in identical cups). What is the probability that a) All four tasters choose Tasty Bean?
What is the arithmetic mean number of appointments she made per hour? What is the median number of appointments per hour? Write a brief report summarizing the findings.
Make use of normal probability distribution features of EXCEL to help determine the probability.
With a mean of 33 oz. and a standard deviation of 0.7 oz. 95% of packets actually contain more than x oz. of soap powder. What is x?
owever, one of the children fails to solve the problem, so the researcher has an undetermined score. What is the best measure of central tendency for these data?
In Excel use the Descriptive Statistics and comment on the mean, the skewness, the standard deviation and kurtosis.
based on the number of voids a ferrite slab is classified as either high medium or low. historically 5 of the slabs
Draw the histogram for these data using an initial class boundary of , an ending class boundary of , and classes of equal width.
for a parallel structure of identical components the system can succeed if at least one of the components succeeds.
A sample mean is 102. another 50 observation with a standard deviation of 6 and a sample mean of 6. conduct a hypothesis using the .05 significance level.
a group of n men and m women is randomly lined up. find the expected number of men who are next to at least one woman.
1. construct the confidence interval for the population mean?c0.95 xsamplemean 16.1 s8.0 and n90a 95 confidence
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