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For the data in the following sample:
8, 1, 5, 1, 5
a. Find the mean and the standard deviation.
b. Now change the score of X 8 to X 18, and find the new mean and standard deviation.
c. Describe how one extreme score influences the mean and standard deviation.
You own a $46,000 portfolio comprised of four stocks. The values of stocks A, B, and C are $5,600, $16,700, and $11,400, respectively. What is the portfolio weight of stock D?
an office has the following types of employees.femalemaleadministrative2021managerial1210operational4238if one person
According to the regional bar assoc., 60% of people who take the bar exam pass. Find the approximate probability that at least 61% of 200 randomly selected people taking the bar will pass. Round to three decimal places as needed.
Make a worksheet in Excel for your calculations. (b) Make a histogram of the data. Would you be justified in using a parametric t test that assumes normality? Explain.
Is there a method which is accepted across industries for determining the minimum size of valid sample? N>50 +(8m aka 8 times the number of independent variables)
The following payoff matrix has been developed for the decision problem. What is the opportunity loss when "A" is Investment alternative and "Decline" is state of nature?
A feed company is developing a feed supplement from two grains A and B. Each kilogram of A contains 0.3 grams of protein and 0.2 grams of carbohydrates; each kilogram of B contains 0.9 grams of protein and 0.1 grams of carbohydrates.
Suppose that possibility of being seated at two restaurants are independent of each other, determine the probability that. Both restaurants will be able to seat you next Saturday night?
Which of the following statements is true regarding a nonparametric test?
Suppose that 40% of cars in your area are manufactured in the United States, 30% in Japan, 10% in Germany, and 20% in other countries. If you randomly select 6 cars, what is the probability that two of them are Japanese?
Standard deviation of 0.7 inches. If 21 items is chosen at random, what is the probability that their mean length is less than 10.5 inches.
telephone calls arrive at the information desk of a large computer software company at a rate of 15 per hour.a what is
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