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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 menOs and womenOs health. One of the variables collected on this survey is the age at first marriage. The histogram below shows the distribution of ages at first marriage of 5,534 randomly sampled women between 2006 and 2010. The average age at first marriage among these women is 23.44 with a standard deviation of 4.72. 000 800 600 400 200 10 15 20 25 30 35 40 45 Age at first marriage a) Assume that the standard deviation of this sample is an accurate estimate of the population sample standard deviation and estimate the average age of US women at first marriage using a 90% confidence interval. Give your answers to two decimal points. 90% confidence interval in years: ( b) Suppose that Canadian women have the same population standard deviation as American women when it comes to age at first marriage. We would like to obtain a 90% confidence interval for the age at first marriage of Canadian women and we would like the margin of error of the interval to be less than one year. How large a random sample do we require? Sample size n =

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 menOs and womenOs health. One of the variables collected on this survey is the age at first marriage. The histogram below shows the distribution of ages at first marriage of 5,534 randomly sampled women between 2006 and 2010. The average age at first marriage among these women is 23.44 with a standard deviation of 4.72. 000 800 600 400 200 10 15 20 25 30 35 40 45 Age at first marriage a) Assume that the standard deviation of this sample is an accurate estimate of the population sample standard deviation and estimate the average age of US women at first marriage using a 90% confidence interval. Give your answers to two decimal points. 90% confidence interval in years: ( b) Suppose that Canadian women have the same population standard deviation as American women when it comes to age at first marriage. We would like to obtain a 90% confidence interval for the age at first marriage of Canadian women and we would like the margin of error of the interval to be less than one year. How large a random sample do we require? Sample size n =

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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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 menOs and womenOs health. One of the variables collected on this survey is the age at first marriage. The histogram below shows the distribution of ages at first marriage of 5,534 randomly sampled women between 2006 and 2010. The average age at first marriage among these women is 23.44 with a standard deviation of 4.72. 000 800 600 400 200 10 15 20 25 30 35 40 45 Age at first marriage a) Assume that the standard deviation of this sample is an accurate estimate of the population sample standard deviation and estimate the average age of US women at first marriage using a 90% confidence interval. Give your answers to two decimal points. 90% confidence interval in years: ( b) Suppose that Canadian women have the same population standard deviation as American women when it comes to age at first marriage. We would like to obtain a 90% confidence interval for the age at first marriage of Canadian women and we would like the margin of error of the interval to be less than one year. How large a random sample do we require? Sample size n =
Transcribed Image Text: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 menOs and womenOs health. One of the variables collected on this survey is the age at first marriage. The histogram below shows the distribution of ages at first marriage of 5,534 randomly sampled women between 2006 and 2010. The average age at first marriage among these women is 23.44 with a standard deviation of 4.72. 000 800 600 400 200 10 15 20 25 30 35 40 45 Age at first marriage a) Assume that the standard deviation of this sample is an accurate estimate of the population sample standard deviation and estimate the average age of US women at first marriage using a 90% confidence interval. Give your answers to two decimal points. 90% confidence interval in years: ( b) Suppose that Canadian women have the same population standard deviation as American women when it comes to age at first marriage. We would like to obtain a 90% confidence interval for the age at first marriage of Canadian women and we would like the margin of error of the interval to be less than one year. How large a random sample do we require? Sample size n =
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