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(Solved): 10 and 11 9. The heights of men are taller than 160.4 cm, then the mean a. 147.8 cm b. 152 ...
10 and 11
9. The heights of men are taller than 160.4 cm, then the mean a. 147.8 cm b. 152.6 cm c. 168.2 cm 10. The probability that a family has fewer than 2 children is 0.2, then the probability that a family has more than 2 children is c. 0.8 or more b. 0.8 a. 0.2 d. 0.8 or less 11. The ratio of smokers to nonsmokers in a population is 3:4. A random sample of 70 people is selected, then the expected number of smokers in the sample is b. 40 c. 30 d. 21 umhnhility distribution P(x), which of the following is not
Expert Answer
Solution to question number 10: Let X be the number of children in the family. Then we are given, P(X<2) = 0.2 Thus, the required probability that a family has more than 2 children is given as, P(X>2) = 1- P(X<