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A certain segment of the sky contains Z stars. Each star is either a red giant with probability 1/3 or a white dwarf with probability 2/3, independently from the other stars.
(a) If we condition on the event {Z = 4}, what is the joint p.m.f. of the red giants X and the white dwarves Y ? Fill in a 5 × 5 table with the (f (x, y))4x,y=0 values.
(b) Show that if Z ? POI(6), then the random variables X and Y are independent and have Poisson distribution by calculating the joint p.m.f. of X and Y .
The hypothesis test produces a z-score of z = 2.37. Assuming that the researcher is using a two-tailed test, what decision should be made?
(a) At the 5 percent level of significance, does this sample prove a violation of the guideline that the average patient should pay no more than $250 out-of-pocket? State your hypotheses and decision rule. (b) Is this a close decision?
in a paired-samples t test the null hypothesis posits that the mean of the comparison distribution isselect onea. -1.b.
The length of time to do a complete full service oil change at Speedy-Lube is normally distributed with a mean of 15.8 minutes and a standard deviation of 2.2 minutes
If absolute value of test statistic is less than critical value in hypothesis test decision is to?
For each of the following, indicate whether the type of probability involved is an example of a priori probability, empirical probability, or subjective probability.
Conduct the hypothesis test and provide the test statistic, critical value and/or P- value and state the conclusion.
What is the probability that all tree students pick a different card?
in my class of 20 students 7 are juniors 11 are seniors and 9 are senior biology majors.a. what is the probability of
Exponential distribution with a mean of 4 minutes. What is the probability that a person is served in less than 3 minutes on at least 4 of the next 6 days.
each person in random samples of 227 male and 283 female working adults living in a certain town in canada was asked
heights of men on a baseball team bell-shaped distribution wit ha mean of 183 cm and a standard deviation of 6 cm.
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