In the 2018 General Social Survey, a random sample of 1666 adults in the U.S. was asked how oldthey were when they had their fırst child. The average age at first birth for this sample was 24.3,with a standard deviation of 5.74. Use these data to calculate a 95% confidence interval for themean age at first birth in the population, and answer the following questions based on thosecalculations.What is the margin of error for this confidence interval?

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Answered: In the 2018 General Social Survey, a…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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Suppose we wish to calculate a 90% confidence interval for the average amount spent on books by freshmen in their first year at a major university. The interval is to have a margin of error of $2. Assume that the amount spent on books by freshmen has a normal distribution with a standard deviation of $30. How many observations are required to achieve this margin of error?
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