Answered: Given two independent random samples…

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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Question

Given two independent random samples with the following results:

n1=7x‾1=179s1=22n1=7x‾1=179s1=22 n2=14x‾2=145s2=20n2=14x‾2=145s2=20

Use this data to find the 80% confidence interval for the true difference between the population means. Assume that the population variances are not equal and that the two populations are normally distributed.

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Step 1 of 3 :

Find the point estimate that should be used in constructing the confidence interval.

Step 2 of 3 :

Find the margin of error to be used in constructing the confidence interval. Round your answer to six decimal places.

step 3 of3: construct the 80% confidence interval.Round your answers to nearest whole number.

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

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