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Get Full Access to Stats Modeling The World - 4 Edition - Chapter 22 - Problem 12
Get Full Access to Stats Modeling The World - 4 Edition - Chapter 22 - Problem 12

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# Crawling Data collected by child development scientists produced this confidence ISBN: 9780321854018 481

## Solution for problem 12 Chapter 22

Stats Modeling the World | 4th Edition

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Problem 12

Crawling Data collected by child development scientists produced this confidence interval for the average age (in weeks) at which babies begin to crawl: t-Interval for m 29.202 6 m1age2 6 31.844 (95.00% Confidence): a) Explain carefully what the software output means. b) What is the margin of error for this interval? c) If the researcher had calculated a 90% confidence interval, would the margin of error be larger or smaller? Explain.

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T wo quantitative variables: Linear Regression Purpose: How to use one variable to predict the other when there is a linear trend. Linear regression: process of fitting a line to a set of data, the line of best fit is called the regression line. Equation for a line: y=a+bx, where a is the y-intercept and b represents the slope of the line.  Finding the regression line means finding values for the slope and intercept of the line that best describes the linear trend of the data. Example: If data pairs are (x,y) with as the explanatory variable and y as the response, the regression line is given by y(hat)=a+bx. Regression line is often called a prediction equation because we can use it to make predictions in certain situations, for example in a tipp

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##### ISBN: 9780321854018

This full solution covers the following key subjects: . This expansive textbook survival guide covers 31 chapters, and 1357 solutions. Stats Modeling the World was written by and is associated to the ISBN: 9780321854018. The full step-by-step solution to problem: 12 from chapter: 22 was answered by , our top Statistics solution expert on 03/16/18, 04:57PM. Since the solution to 12 from 22 chapter was answered, more than 231 students have viewed the full step-by-step answer. This textbook survival guide was created for the textbook: Stats Modeling the World, edition: 4. The answer to “Crawling Data collected by child development scientists produced this confidence interval for the average age (in weeks) at which babies begin to crawl: t-Interval for m 29.202 6 m1age2 6 31.844 (95.00% Confidence): a) Explain carefully what the software output means. b) What is the margin of error for this interval? c) If the researcher had calculated a 90% confidence interval, would the margin of error be larger or smaller? Explain.” is broken down into a number of easy to follow steps, and 71 words.

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