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Age at first marriage The National Survey of Family Growth conducted by the Centers for...

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Age at first marriage The National Survey of Family Growth conducted by the Centers for Disease Control gathers information on family life marriage and divorce pregnancy infertility use of contraception and men s and women s health One of the variables collected on this survey is the age at first marriage The average age at first marriage among 5932 women is 22 3 with a standard deviation of 4 3 NSFG 2010 Construct a 84 confidence interval to estimate the average age at first marriage of women and write a sentence interpreting this interval 84 confidence interval Round to two decimal places Interpretation O The researchers can be 84 confident that the sample mean of the ages at their first marriage is in this confidence interval O The researchers can be 84 confident that the true mean age of all women at their first marriage is in this confidence interval O 84 of women have their first marriage when their age is within our confidence interval O There is 84 chance that true mean is in this confidence interval

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