A study has been conducted to verify the mean of birth weight at Apple County. From thesimple random sample collected, the mean was 3.433 kg and the standard deviation of allbirth weights is 495 g.a) Using a sample size of 75, construct a 95% confidence interval estimate of the meanbirth weight in the Apple County.b) Using a sample size of 75,000, construct a 95% confidence interval estimate of themean birth weight in the Apple County.c) Which of the preceding confidence intervals is wider? Why?

Let μ and σ denote respectively the population mean and standard deviation of birth weight in the…

Answered: A study has been conducted to verify…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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From a research survey, it was found that a random sample of 18 elementary graduates of an exclusive private school has a mean NEAT score of 90 with a standard deviation of 16, while a random sample of 24 elementary graduates of a public school showed a mean NEAT score of 85 with a standard deviation of 12. Is there a significant difference in the NEAT performance of these two groups of elementary graduates? a. Use the traditional method, and b. The P-value method c. Construct a 95% confidence interval for the difference in mean.
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A random sample of 40 adults with no children under the age of 18 years results in a mean daily leisure time of 5.65 hours, with a standard deviation of 2.29 hours. A random sample of 40 adults with children under the age of 18 results in a mean daily leisure time of 4.26 hours, with a standard deviation of 1.98 hours. Construct and interpret a 90% confidence interval for the mean difference in leisure time between adults with no children and adults with children (μ1−μ2.) Let μ1 represent the mean leisure hours of adults with no children under the age of 18 and μ2 represent the mean leisure hours of adults with children under the age of 18. b. The 90% confidence interval for μ1−μ2 is the range from ____ hours to _____ hours. (Round to two decimal places as needed.) What is the interpretation of this confidence interval? A. There is 90% confidence that the difference of the means is in the interval. Conclude that there is insufficient evidence of a…

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