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Suppose that a random variable, X has the probability distribution
FX(x) = {0 if x < 0
(x/2)+(1/4) if 0 greaterthanorequalto x < 1
C-((e^-x)/(3)) if 1 greaterthanorequalto x < infinity}
Answer the following questions (a) What is the value of the constant C? (b) What is the corresponding mixed density? (c) What is the expectation of X? (d) What is the variance of X?
data from the years 2000 through 2009 shows a strong positive association between consumption of cheese in u.s. per
Which of the following is true about the expected value of perfect information. It is the amount you would pay for any sample study.
A mean of 45 months and a standard deviation of 8 months. if a random sample of 600 batteries is selected, how many batteries would weigh last more than 48 months?
Find the sample mean and sample standard deviation of the amount citizens spend per year. When finding a confidence interval for the true mean spent of ALL citizens, should we use a z-score or a t-score? Why?
A product sold by Home Depot, Inc., with an annual demand of 1000 units has Co = $25.50 and Ch = $8. The demand exhibits some variability such that the lead-time demand follows a normal probability distribution
Consider a random sample of size n from an exponential distribution, Xi ~ EXP(1,eta). a) Show that Q = X1:n - eta is a pivotal quantity and find its distribution.
assume that the helium porosity in percentage of coal samples taken from any particular seam is normally distributed
They find that these 100 people lost an average of 38 hours with a standard deviation of 9.5 hours. What is the P-value for this significance test?
a researcher wants to construct a 98 confidence interval for the proportion of elementary school students in seward
what is the distribution of the case described here? mrs. shop wants to buy three high quality fountain pens at a
The tolerance of the automatic filling machine, leads to weights of bags being approximately Normally distributed with standard deviation 5g.
For each of the following research questions does the situation or research question involve independent samples or paired data
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