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In a certain city, the daily consumption of electric power, in millions of kilowatt-hours, is a random variable X having a gamma distribution with mean µ = 6 and variance a2 = 12.
a) Find the values of a and 0.
b) Find the probability that on any given day the daily power consumption will exceed 12 million kilowatt-hours.
Suppose you take a random sample of 15 bearings and compute xbar = 8.2535. What is the probability that you will see a sample mean greater than xbar?
Assuming that = 119.5 ng.ml, test the claim that the mean cotinine level of all smokers is equal to 200.0 ng/ml. Use a 0.05 significance level.
How much do typical employee and his or her family spends per year on dental expenses? Sample of 45 employee reveals mean amount spend last year was $1,820, with standard deviation of $ 660.
A manufacturer of flashlight batteries took a sample of 13 batteries from a day's production and used them continuously until they failed to work.
The natural number 28A9B consists of different numbers and A is not equal to 0. When the number is divided by 9 the remainder is 7 and when it is divided by 5
Probability of selecting a household with no children that is equal to the value obtained by the census. Give the z statistic (rounded to two decimal places) and the P-value. What do you conclude?
Construct the 95 percent confidence interval for the difference between the two population means.
The populations must all be normally distributed, what is meant by normally distributed?
State the appropriate set of hypothesis to test whether there is a relationship between the variables X and Y.
The undergraduate grade point average (GPA) for students admitted to the top graduate business schools was 3.37 (Best Graduate Schools, U.S. News and World Report, 2001).
If two televisions are randomly selected, compute the probability that both televisions work. What is the probability at least one does not work?
Using α = 0.05, does this sample provide enough evidence to conclude that the average utility bill in Delaware was lower in the winter of 2011-2012 than it was in the winter of 2010-2011?
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