Distinguish between risk and odds Question Researchers wanted to study if couples having children are married. They surveyed a large group of people. The data are shown in the contingency table below. What is the odds ratio for married people having children against unmarried people having children? Round your answer to two decimal places. Children No Children Total Married 97 35 132 Not Married 68 71 139 Total 165 106 271
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Risk is the probability that an event will occur, while odds are the ratio of the probability that an event will occur to the probability that it will not. In this case, the risk of a married person having children is 97/132 = 0.73, and the risk of an unmarried Show more…
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Researchers wanted to study if couples having children are married. They surveyed a large group of people. The data are shown in the contingency table below. What is the odds ratio for married people having children against unmarried people having children? Round your answer to two decimal places. MarriedNot Married TotalChildren 97 68 165 No Children35 71 106 Total 132 139 271
Sanchit J.
Criterion: Determine the probability. Instructions: Read the following and answer the question below. Probability of first marriage among women. A National Center for Health Statistics (NCHS) brief report by the Centers for Disease Control and Prevention (CDC) in 2009 identified that about 6% of women in the United States married for the first time by their 18th birthday, 50% married by their 25th birthday, and 74% married by their 30th birthday. Based on these data, what is the probability that in a family with two daughters, the first and second daughter will be married by each of the following ages? 1. 18 years of age:___________________________ 2. 25 years of age:___________________________ 3. 30 years of age:___________________________
Wei Z.
Suppose that 20,000 married adults in the United States were randomly surveyed as to the number of children they have. The results are compiled and are used as theoretical probabilities. Let $X =$ the number of children married people have. $$\begin{array}{|l|l|l|}\hline x & {P(x)} & {x P(x)} \\ \hline 0 & {0.10} \\ \hline 1 & {0.20} \\ \hline 2 & {0.30} \\ \hline 3 & {} \\ \hline 4 & {0.10} \\ \hline 5 & {0.05} \\ \hline 6(\text { or more }) & {0.05} \\ \hline\end{array}$$ a. Find the probability that a married adult has three children. b. In words, what does the expected value in this example represent? c. Find the expected value. d. Is it more likely that a married adult will have two to three children or four to six children? How do you know?
Discrete Random Variables
Mean or Expected Value and Standard Deviation
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