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It has been suggested that an investment portfolio selected randomly by throwing darts at the stock market page of The Wall Street Journal may be a sound (and certainly well-diversified) investment.
Suppose that you own such a portfolio of 16 stocks randomly selected from all stocks listed on the New York Stock Exchange (NYSE).
On a certain day, you hear on the news that the average stock on the NYSE rose 1.5 points.
Assuming that the standard deviation of stock price movements that day was 2 points and assuming stock price movements were normally distributed around their mean of 1.5, what is the probability that the average stock price of your portfolio increased?
suppose a geyser has a mean time between eruptions of 94 minutes. let the interval of time between the eruptions be
1.when using past data i have found that the proportion of items rejected by quality control personnel is about 3. we
A radio station in Myrtle Beach announced that at least 90% of the hotels and motels would be full for the Memorial Day weekend. The station advised listeners to make reservations in advance if they planned to be in the resort over the weekend.
68 of these drivers were wearing seat belts. We wish to find if these data give good reason to conclude that more than half of Hispanic female drivers in Boston wear seat belts.
experiments have shown that when a clean tungsten surface is heated by laser irradiation using a focused ruby laser
Mean output of solar cells of three types are measured six times under random light intensity over a period of 5 minutes, yielding the results shown. Research Question: Is the mean solar cell output the same for all cell types?
In a study to compare the perceived effects of two pain relievers, 200 randomly selected adults were given the first pain reliever, and 93% indicated appreciable pain relief. Of the 450 individuals given the other pain reliever, 96% indicated expe..
Describe the similarities between an F-ratio and a t statistic. The basic relationship between t statistic and F-ratios can be stated in an equation. What is that equation?
an urn contains two black balls and three white balls. one ball is drawn uniformly at random. the ball is replaced in
Give a 99% confidence interval for the rating of the table that would be given by an average member of the population of regular customers. Assume normality.
For 1989 and 1990 Dave Johnson had the highest decathlon score in the world. When Johnson reached a speed of 32 ft/sec on the pole vault runway, his height above the ground t seconds after leaving the ground was given by h= -16t^2+32t.
Plot stem-and-leaf plot and boxplot for Mtotal. Illustrate hand calculation of median location and upper hinge location of boxplot, and determine their corresponding data values.
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