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Investment A has an expected return of $25 million and investment B has an expected return of $5 million. Market risk analysts believe the standard deviation of the return from A is $10 million, and for B is $30 million (negative returns are possible). (A) If you assume returns follow a normal distribution, which investment would give a better chance of getting at least a $40 million return? Explain. (B) How could your answer to part (A) change if you knew returns followed a skewed distribution instead of a normal distribution? Explain.
The monthly income of residents of Dayton is normally distributed with a mean of $3000 and a standard deviation of $500.
Translate this into a statistical hypothesis-testing problem and carry out the test. Be sure to give the null and alternative hypotheses, the value of the test statistic, the p-value, and your conclusions.
The population's standard deviation is 2.00 hours per week. Based on a sample of 49 students, Healthy Lifestyles Incorporated (HLI) would like to apply the central limit theorem to make various estimates.
Conditional and compound probabilities.The table below gives the distribution of blood types by gender in a group of 1000 individuals.
In a poll to estimate presidential popularity, each person in a random sample of 1000 voters was asked to agree with one of the following statements:
In a recent year, 11th grade New York public school students taking an English test produced test scores that were normally distributed with a mean of 81 and a standard deviation of 6. Let x be a random variable that represents a test score.
A mean score on a standardized test is 50 with a standard deviation of 10. Answer the following
Suppose population standard deviation for those drinking regular coffee is 1.20 cups per day and 1.36 cups per day for those drinking decaffeinated coffee.
Classify the following as an example of nominal, ordinal, interval, or ratio level of measurement, and state why it represents this level: rankings of the top ten best-selling authors
Perform a significance test to assess whether there is an association between mortality from cirrhosis of the liver and duration of employment in the group hired after 1945. Report a p- value.
According to table, which presents a MODI solution for a transportation problem, if that solution is used, which of the following is true.
The mean return for the random sample of 33 mutual funds is 14.93 percent with a standard deviation of 9.57. Test the null hypothesis: H0: mu = 15% at α = 0.05.
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