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A statistics practitioner conducted a two-factor analysis of variance experiment with a =4, b = 3, and r = 8. The sum of squares are listed here:
SS(total) = 9420
SS(A) = 203
SS(B) = 859
SS(AB) = 513
Test at the 5% significance level to determine whether factors a and b interact.
If a sample of 25 workers found that the average work week is 48 hours, conduct a hypothesis test to determine if there is significant evidence that the length of the average work week has increased? Use alpha=.05
A bowl with 10 marbles: 2 red marbles, 3 green marbles, and 5 blue marbles. We randomly select 4 marbles from the bowl, WITH REPLACEMENT, that is once a marble is selected, its color is noted and the marble is put back in the bowl (notice this doe..
Determine the probability that computer will fail within 12 months?
At the 0.05 level of significance, test whether the mean baseline body mass index for the population of middle aged men who develop diabetes is equal to 24.0 kg/m 2 , the mean for the population of men who do not. What is the p-value of the test?
Suppose a product must go through a sequential assembly line made up of ?ve operations. The time it takes to complete each operation is normally distributed with a mean of 180 seconds and standard deviation of 5 seconds.
One normal curve has mean 23 and standard deviation 1, a second normal curve has mean 5 and standard deviation 10. The curve that is more dispersed, or spread out, is
The probability distribution of a random variable X is shown below, where X represents the amount of money (in $1,000s) gained or lost in a particular game of Blackjack.
Standard deviation was increased to 40, determine the overall effect on their society? Would this change be a good thing?
Calculate the mean, mode and median of the grouped data derived from the frequency distribution above. Compare the results obtained from
Describe how multiple correlation and/or regression analysis is (or could be) applied in your work or life environments. Define the dependent and independent variables.
Chi-square test for independent attributes - Are the opinions on the tax cut proposal independent of party affiliation? Use a = 0.01
A professor asked her sophomore students, "How many drinks do you typically have per session? (A drink is defined as one 12oz beer, one 4oz glass of wine, or one 1oz shot of liquor.)"
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