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A risky portfolio, P, is constructed with 2 risky securities, X and Y. The weights of X and Y in P are 0.60 and 0.40, respectively. X has an expected rate of return of 0.14 and variance of 0.01, and Y has an expected rate of return of 0.10 and a variance of 0.0081. The coefficient of correlation, rho, between X and Y is 0.45. What is the SR for the portfolio P? What is the change in SR if the coefficient of correlation is changed to -0.20? Assume TB rate is 5%.
Determine the percentage of respondents who favor stronger gun control laws and the percentage of respondents who oppose stronger gun control laws.
A survey last week revealed that out of 400 viewers contacted, 94 watched the news on WBEN. Can we conclude that the percent of viewers has increased? Use the 0.05 significance level.
The number of defective items out of random samples of 100 windshield wipers selected at the end of each production shift at a factory is as follows.
What is the importance of pretesting questions and instruments? What are risks of not doing this? Provide an example.
A regression of height (X, in inches) on hourly earnings (Y, in dollars), yields the following results: What is the value of b1 in the regression Y = b0 + b1X?
What kind of test would be appropriate? State the null and alternative hypotheses - How many degrees of freedom are there?
Provide an example of how an ANOVA could expand on the results of a t-test. In other words, think of an example (related to the field of psychology) in which you could use a t-test, and then note how the comparison could change if an ANOVA was use..
Use the IBM APA software to calculate the appropriate descriptive statistics for the variables in your assigned data
a. Construct a bar chart that effectively displays these data. b. Construct a pie chart to display these data.
Check the nonskewness criterion. Is a large-sample hypothesis test about p appropriate?
your company produces metal rods. they are required to be exactly 100cm long. from a quick survey you find that in a
A capital asset pricing model (CAPM) for Johnson & Johnson (J&J) was discussed in Example 15.3. The model uses the risk-adjusted stock return
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