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You have purchased five shares of stock in Diversified Machine Tools which has a mean value of $25 and a standard deviation of $9, and 10 shares in Northwest Foods, Inc. which has a mean value of $40 and a standard deviation of $11. The correlation between the two stock prices is -0.40.
a. Calculate the expected value of your portfolio.
b. Calculate the expected standard deviation of your portfolio.
c. What would be the difference in the expected standard deviation of your portfolio if the prices of the two stocks were independent?
Construct a 95% confidence interval estimate for the population proportion of adults who report that e-mails are easy to misinterpret.
Compute the value of t. What is your decision regarding the null hypothesis?
The assembly time for a product is uniformly distributed between 6 to 10 minutes.
A Myrtle Beach resort hotel has 120 rooms. In the spring months, hotel room occupancy is approximately 75%. What is the probability that at least half of the rooms are occupied on a given day?
the probability that it gets by the first inspector is 0.1. Of those that get past the first inspector, the second inspector will miss 5 out of 10. What fraction of the defective items gets by both inspectors?
a standard deviation of 7.3 years. What is the 95% confidence interval estimate for the average number of years served by all Supreme Court justices?
Student volunteers in a weight loss project were randomly assigned to one of three diets. After 2 months on the diets, subjects were weighed and weight loss was recorded for each person.
What is the probability that a single, randomly selected piece of material will be defective? (Give the answer to two decimal places.)
Suppose normality, determine a 90% confidence interval for population variance.
An analyst wishes to include number of older siblings in family as a predictor variable in a regression analysis of factors affecting maturation in eighth graders. The number of older siblings in the sample observations ranges from 0 to 4.
Chicken Delight claims that 90% of its orders are delivered within 10 minutes of the time the order is placed. A sample of 100 orders revealed that 82 were delivered within the promised time.
Find a linear function G(p) that gives the number of gallons sold as a function of the price of the milk.
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