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Problem 1. Consider the population of 200 weekly observations presented in Table P-13.The independent variable X is the average weekly temperature of Spokane, Washington.The dependent variable Y is the number of shares of Sunshine MiningStock traded on the Spokane exchange in a week. Randomly select data for 16 weeks and compute the coefficient of correlation.(Hint: Make sure your sample is randomly drawn from the population.) Then determine the least squares line and forecast Y for an average weekly temperature of 63.
Problem 2. An investor with a substantial stock portfolio sued her broker and brokerage firm because lack of diversification in her portfolio led to poor performance. The rates of return for the 39 months that the account was managed by the broker produced these summary statistics:X = -1.10%, S = 5.99%. Consider the 39 monthly returns as a random sample from the population of returns the brokerage would generate if it managed the account forever. Using the sample results, construct a 95% confidence interval for the mean monthly market return. Let the S&P 500 represent the market and suppose the mean S&P 500 return for the same period is 0.94%. Is this a realistic value for the population mean of the client's account? Explain.
MATH1550H: Assignment: Questions: Let’s assume the department of Mathematics of Trent University has 11 faculty members. For i = 0; 1; 2; 3; find pi, the probability that i of them were born on Canada Day using the binomial distributions.
A random selection of accounting firms from three regions is taken and they are asked to state the starting salary for a new accounting graduate. Do a one-way ANOVA to analyze these data using a 1% level of significance:
Find the mean, median, and range for each of the two data sets. b.Find the standard deviation using the rule of thumb for each of the data sets.
If Molly and Kathleen wishes to make a profit of $5,000 for summer, how many pupils do they require to enrol?
Carry out test of independence to find out whether employee health insurance coverage is independent of size of company. Use α = 0.05 level of significance.
An olympic archer is able to hit bull's-eye 80% of the time. assume each shot is independent of the others. if she shoots 6 arrows, what's the probability of each of these results? She gets at least 4 bull's-eyes?
Draw the tree diagram for experiment and complete the table below that represents the probabilities for each of the values that the random variable X will asume.
You are asked to estimate the chance that the sum will be positive. Can you do it if you are also told the average and SD of the numbers in the box, but are not told the numbers themselves?
The mean salary for engineers with less than 5 years' experience is $60,000 with a standard deviation of $5,000. Compute the z values for both Rob and Rachel.
Using sample, determine a 98% confidence interval for mean weight of whole daily output.
The director of admissions at Kinzua University in Nova Scotia estimated the distribution of student admissions for the fall semester on the basis of past experience.
Finding and retaining good health care professionals requires an agressive recruitment effort. Since the demand for health care professionals is growing and the supply of these workers is not keeping pace, an untapped source of workers retired emp..
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