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Question: For the return in 2005:
a. Construct a histogram.
b. Plot percentage polygons of the return in 2005 for growth mutual funds and value mutual funds on the same graph.
c. What conclusions about the return in 2005 can you reach based on the results of (a) and (b)?
Assume the distribution of silver content is normal, and find a 99% confidence interval for the population variance in silver content.
That is, find the 80thpercentile, which is the X that represents the weight of the suitcase. Assume that the variable is normally distributed.
a statistician determines the amount of daily pocket money to give to his son by flipping 5 quarters and giving the
suppose that 88 of college men and 82 of college women were employed last summer. a sample survey interviews
Five credit scores are 680, 680, 700, 720, 720. The data set is bimodal because the scores 680 and 720 each occur twice.
Constructing a 95% confidence interval for the true length of time for all pepper seeds to germinate you must calculate the margin of error. The margin of error in this case is 0.60.
Let pbinom(x, n, p) be the CDF of the Bin(n, p) distribution, evaluated at x. In terms of pbinom, find a simple expression for the probability.
Find the value for the correlation coefficient r.
Use the normal approximation to the binomial with a correction for continuity. Round your answer to at least three decimal places. Do not round any intermediate steps.
how many wayss are there to select an unordered group of eight numbers between 1 and 25 inclusive with repetition? in
b. If X has a standard normal distribution, use part (a) to write the integral that equals P(X2 ≤ y). Then differentiate this with respect to y to obtain the pdf of X2 [the square of a N(0, 1) variable]. Finally, show that X2 has a chi-squared distri..
If he selects the three brands at random, what is the probability that he will select the following?
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