Answered: A researcher takes sample temperatures…

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

A researcher takes sample temperatures in Fahrenheit of 19 days from New Orleans (Group 1) and 19 days from Minneapolis (Group 2). Test the claim that the mean temperature in New Orleans is different than the mean temperature in Minneapolis. Use a significance level of α=0.01α=0.01. Assume the populations are approximately normally distributed with unequal variances. You obtain the following two samples of data. Round answers to 4 decimal places.

New Orleans	Minneapolis
82.3	68.7
80.9	71.3
86.6	45.7
81.6	47.1
77.6	57.2
84.3	74.8
82.5	67.2
101.3	69.1
66.6	87.4
77.1	64.9
82.1	68.7
65.2	89.9
68.3	78
80.4	54.7
71.9	64
83	73.7
71.5	73.3
93.4	59.3
85.4	75.9

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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