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A dish contains 20 gumballs - 9 blue, 6 red and 5 white. We randomly select two gumballs from the dish without replacement.
a) Let X be the number of blue gumballs selected. Complete the probability distribution of X by filling in the appropriate probabilities below:
x 0 1 2P(X = x)
b) What is the probability that X = 1 if no red gumballs are selected?
c) What is the expected value of X?
Given CAPM as the benchmark, is either of the two managers over-performing the market? What if you use the Sharpe Ratio as benchmark? Explain the answer carefully.
Is there evidence to suggest a difference in the mean waiting times at the four body shops?
Determine new, standardized score for each of following values from original population.
Assuming that students make their decisions independently, the number who accept has the B (1200, 0.75) distribution. If this number is less than 950, the college will admit students from its waiting list.
Four wheel bearings have been replaced on a company car. The mechanic has selected 4 bearings from a large supply bin. The mechanic is unaware that 10 percent of the bearings fail within the first 100 miles.
Is there evidence of a difference in objection to sharing information among the organizational groupings? (use α = 0.05)
Can we conclude that there is a positive association between the size of the home and the selling price? Use the .05 significance level.
Should Katie conduct a between-subject ANOVA or a within-subject ANOVA? Describe your answer.
a) Find the 95% confidence interval for the population mean based on the 37 patients who remain after you drop the outlier. b) Compare your interval in (a) with your interval from Exercise 18.32. What is the most important effect of removing the ou..
Use the normal distribution to approximate the desired probability. Find the probability that in 200 tosses of a fair die, we will obtain at exactly 30 faces.
A random variable has a standard deviation of 16, and an unknown mean. Find the lowest size of a simple random sample so that the sample mean estimates the population mean with a standard error no larger than 0.25.
The Price-to-Earnings ratio (P/E) of a publicly listed profit-making company is defined as the ratio of the stock price of the company to the earnings per share.
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