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Tom O'Brien has a 2-stock portfolio with a total value of $100,000. $37,500 is invested in Stock A with a beta of 0.75 and the remainder is invested in Stock B with a beta of 1.42. What is his portfolio's beta?
Summarize the results and give a brief statement of your conclusion. Your two-way table has a count of zero in one cell. Does this invalidate your significance test? Explain why or why not.
Consider a study in which the population variance estimate based on an experimental group of 10 participants is 6 and the population variance estimate based.
How to determine the mean and standard deviation of all the potential sample means?
1. Suppose you are testing H0: N(55, 64) vs. H1 N(45, 49), with α = .05. Your test will be one draw x from one of these two populations. What is your critical boundary for x (not the one for the z score of x)? For what values of x would you r..
a) How much more cereal do you expect to be in the large bowl? b) What's the standard deviation of this difference?
in a region 80 of the population have brown eyes. if 12 people are randomly selected find the probability that at least
You bet your friend that, of the next 15 automobiles to appear, at least two will have license plates beginning and ending with the same number. What is your pr
For satisfaction with the purchase of sunglasses, the estimate of beta, the slope of S with respect to M,was b = 2.20. The reported t statistic was 2.53. The sample size was n = 54.7 Is this regression statistically significant? Explain the findin..
suppose the covariance between y and x is 0.03 and that the variance of y is 0.04 and the variance of x is 0.12. the
What kind of study was this?- Is that an appropriate choice for this problem?- Who were the subjects?- Identify the treatment and response variables.
researchers studied the effects of adding an exercise program to dieting in the achievement of weight loss. a sample of
You observe the gender of the next 950 babies born at a local hospital. The random variable represents tha number of girls. historically , 49.8% of the babies born are girls?
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