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Find the mean and standard deviation for each set of values:
a. 18, 19, 20, 21, 22
b. 20, 20, 20, 20, 20
c. 1, 5, 7, 8, 79
question a random sample of song playing times in seconds is as follows 242 231 220 213 230 293q1. find the standard
what role does sample size play in the accuracy of statistical inference? why is the method of selecting the sample
Internet users age 12-17 in proportion who opposes ads? Solve manually and then by mega stat. Point to your decision rule, your hypotheses and statistical and management conclusions."
in the following problem check that it is appropriate to use the normal approximation to the binomial. then use the
What percentage of the variation in y can be explained by the corresponding variation in x and the least-squares line? What percentage is unexplained?
assume a population of 2 4 and 12. assume that samples of size n2 are randomly selected with replacement from the
What does this data set imply about the possibility of predicting the boiling point of compounds in this series on the basis of the number of carbon atoms? Compute the correlation coefficient between these two variables, even though the number n i..
Let X1, X2, X3, and X4 be independent continuous random variables with a common distribution function F and let p = P{X1 X2 > X3 X4}
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When sampling is from a population with standard deviation C = 55, using a sample of size n = 150, what is the probability that X will be at least 8 units away from the population mean µ,?
The 100 filings showed an average preparation time of 90 minutes with a standard deviation of 140 minutes. What is the standard error of the mean?
a mail order company is investigating the potential advantages of using a new heavy-duty packaging material. they
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