Answered: A researcher must estimate the mean…

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 must estimate the mean temperature (in degrees Fahrenheit) with the following sample temperatures:

45.5
57.6
38.5
26.4
16.3
48.9
39.7
53
38.9
22.8
24.3

Assuming the population of temperatures are normally distributed, find the 90% confidence interval. Round the answers to two decimal places. Enter your answer as an interval of the form (LB,UP).

The researcher is 90% confident that the population average temperature is within the temperature interval .

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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