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What maximum variance of the raw score population could you have and still be able to reject the null hypothesis of μ = 20 (α = .05), if the sample size is 100 and the sample mean is 22?
Hint: standard error is population variance divided by the sample size square rooted.
The price of XYZ Corporation stock is normally distributed all through the year with mean of $42.00 per share and a standard deviation of $2.25 per share. Suppose that the stock is traded 240 days out of the year.
Using your knowledge of infectious disease epidemiology, quantify the pattern of disease X in this group, i.e., what are the infectivity, pathogenicity, and virulence of disease X?
The following table shows the hardness (in Brinell hardness numbers) and the tensile strength (in thousands of pounds per square inch) of ten specimens of a certain alloy.
The project requires you forecast the historical data, replicating the appropriate trends, seasonalities, week-over-week variability, etc. Please refer to the chapter and materials on Forecasting for the procedures to do.
The diameters of oranges in a certain orchard are normally distributed with a mean of 5.26 inches and a standard deviation of 0.500 inches.
Calculate P value? Calculate critical value?
Use empirical Rule to evaluate proportion of costs within 2 standards deviations of mean. Write down these limits.
At the 5 percent level of significance, can we conclude that the mean weight is greater than 16 ounces? Determine the p-value.
Using the data file below, construct a histogram and a frequency polygon. Describe the shape of this distribution.
At the .01 significance level, is there a relationship between job pressure and age?
Use the binomial distribution formula to calculate the probability that:
Find out the following probabilities. Probability that exactly 27 items will be good.
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