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A survey of 200 college graduates who have been working for at least 3 years found that 90 owned only mutual funds, 20 owned only stocks, and 70 owned both.
a. What is the probability that an individual owns a stock? A mutual fund?
b. What is the probability that an individual owns neither stocks nor mutual funds?
c. What is the probability that an individual owns either stock or mutual funds?
The questions is about propagation of bacteria 1) What is the significance of getting single colonies in the streak plate method?
Determine the sample size necessary under the following conditions. To estimate with = 44, E = 3, and 95% confidence. To estimate with a range of values from 20 to 88 with E = 2 and 90% confidence.
if n28 barxx-bar47 and s2 construct a confidence interval at a 98 confidence level. assume the data came from a
The number of vacation days taken by employees of a company is normally distributed with a mean of 14 days and a standard deviation of 3 days. For the next employee, what is the probability that the number of days of vacation taken is less than..
Construct a 95% confidence interval for the population mean, μ. assume the population has a normal distribution. In a random sample of 26 computers.
If the researcher wants to be certain that half of her sample is male and half is female, what type of random sampling scheme should she use?
Professor Stickler always grades "on the curve." "Yes, I see to it that my grades are distributed as 7 percent A's, 24 percent B's, 38 percent C's.
A medical doctor wishes to test the claim that the standard deviation of the systolic blood pressure of deep sea divers is less than 450. To do so, she selected a random sample of 20 divers and found s = 432.
Construct a 95% confidence interval estimate of the difference µ1-µ2, where µ1 is the mean age of student cars and µ2 is the mean age of faculty cars
What is the explained return on an equally weighted portfolio of these three stocks? What is the variance of a portfolio invested 20 percent each in A and B and 40 percent in C?
Is there evidence that the population mean amount is different from 8.17 ounces? (Use a 0.05 level of significance.)
1. Movie companies need to predict the gross receipts of individual movies after a movie has debuted.
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