A social worker is involved in a study about family structure. She obtains information regarding the number of children per family in a certain community from the census data. Identify the random variable of interest, determine whether it is discrete or continuous, and list its possible values.
Answer to relevant QuestionsAccording to the article “Season’s Cleaning,” the U.S. Department of Energy reports that 25% of people with two-car garages don’t have room to park any cars inside. Assuming this to be true, what is the probability ...Of all the trees planted by a landscaping firm, 90% survive. What is the probability that 8 or more of the 10 trees they just planted will survive? (Find the answer by using a table.) Find the mean and standard deviation for the binomial random variable x with n _ 30 and p _ 0.6 using formulas (5.7) and (5.8). a. Use a calculator or computer to find the probability That x _ 3 in a binomial experiment where n =12 and p _ 0.30 P(x _ 3 0 B(12, 0.30)) b. Use Table 5.8 to verify the answer in part a. The probability of success on a single trial of a binomial experiment is known to be .The random variable x, number of successes, has a mean value of 80. Find the number of trials involved in this experiment and the standard ...
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