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The Wall Street Journal reported that long term Treasury bonds had a mean return of 24.03% in 2008. Assume that the returns for the long term Treasury bonds were distributed as a normal random variable, with a mean of 24.03 and a standard deviation of 10. If you select an individual Treasury bond from this population, what is the probability that it would have a return
a. less than 0 (a loss)?
b. between 10 and 20 ?
c. greater than 10 ?
If you select a random sample of 4 Treasure bonds from this population, what is the probability that the sample would have a mean return
d. less than 0 (a loss)?
e. between 10 and 20 ?
f. greater than 10 ?
g. Compare your results in parts (d) through (f) to those in parts (a) through (c)
Determine a 95% confidence interval for proportion of all voters in favour of candidate.
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using the clues given below fill in the rest of the joint distribution. there is only one answer.y x0 3 61
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question for each of the following identify the independent variables dependent variables and the level of
a calculate a confidence intervals for p1 at 1 significance level. mu 395625 sd78550. are the confidence intervals
If statistically significant, do you think the difference is large enough to be important?
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