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Children Gender. A certain couple is equally likely to have either a boy child or a girl child. If the family has four children, let X denote the number of girls. a. Identify the possible values of the random variable X. b. Determine the probability distribution of X. (Hint: There are 16 possible equally-likely outcomes. One is GBBB, meaning the first born is a girl and the next three born are boys.) Use random-variable notation to represent each of the following events. Also use the special addition rule and the probability distribution obtained in part (b) to determine each event's probability. The couple has c. exactly two girls. d. at least two girls. e. at most two girls. f. between one and three girls, inclusive. g. children all of the same gender.
1.an instructor wanted to construct a confidence interval for the mean gpa of the students in his class. he used the
a. Formulate a linear programming model for this problem. b. Solve the model by using the computer.
response time at an online site can be modeled with an exponential distribution with a mean service of 5 minutes. john
Rental car gasoline prices per gallon were sampled at eight major airports. Use α = .05 to test the hypothesis of no difference between the population mean prices per gallon for the two companies
Starting from the definition of s2 and the pdf of a uniform distribution, calculate that the variance of X is , if X ~ Unif(a, b).
Write an essay on the great migration of the black population to the northern United States. What were the reasons for the great migration? What were some of the risks involved for the African Americans who undertook the move?
the manager of the all-night corporation recently conducted a survey of 196 of its employees to determine the average
Refer to given Case Study, in which physicians were randomly assigned to take aspirin or a placebo, and heart attack rates were compared. Draw a figure similar to one of Figures that illustrates the steps for Case Study.
Describe in your own words the difference between a means objective and a fundamental objective. Why do we focus on coming up with attribute scales that measure accomplishment of fundamental objectives, but not means objectives? What good does it ..
In early 2009 the economy was experiencing a recession. But how was the recession affecting the stock market? Shown are the data from a sample of 15 companies.
electric charge is distributed over the rectangle 1 x 2 0 y 2 so that the charge density at x y is sx y 2xy y2
A city employee locates a U.S. Census report that includes the mean and standard deviation for income in the state of Wyoming and then takes a random sample.
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