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Listed below is the rate of return for one year (reported in %) for a sample of 12 mutual funds that are classified as taxable money market funds.
4.63 4.15 4.76 4.70 4.65 4.52 4.70 5.06 4.42 4.51 4.24 4.52
Using the .05 significance level is it reasonable to conclude that the mean rate of return is more than 4.50%?
A paper manufacturer has a production process that operates continuously throughout an entire production shift. The paper is expected to have a mean length of 11 inches, and the standard deviation of the length is 0.02 inches.
Obtain the simple linear regression equation, then analyze the residuals by (a) constructing a histogram
Suppose that the thermometer readings are normally distributed with mean of 0° C and a standard deviation of 1.00° C. A thermometer is randomly selected and tested.
If you draw two balls without replacing the first one, what is the possibility that one ball is red and the other is white.
Where should the warranty limits be set so that only 10 percent of the HDTVs need repairs at the manufacturer's expense?
Calculated test statistic, decision about the null hypothesis interpretation of results, and a list of references consulted.
What is the probability that it will crash at least two times in a given semester? What is the probability that it will not crash at all in a given semester?
A population has mean 325 and variance 144. Suppose the distribution of sample means is generated by random samples of size 36.
What is the relationship between the variance and the standard deviation?
Suppose that a random sample of 14 cars shows an average speed of 24.0 mph, with a sample standard deviation of 2.2 mph. Assume that the speeds of cars are normally distributed. Using the T-table, what is the p-value?
The manufacturer of a nationally known "lite beer" claims that the approval rating for it's product is at least 85%. A local soft drink manufacturer has retained a marketing agency to test the "lite beer".
I did a study correlating net profit per location with expenditures on an in-house promotion, and got a correlation of about .15, and that was received very well.
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