Answered: un-size” Snickers bar is supposed to…

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 “fun-size” Snickers bar is supposed to weigh 20 grams. Assume that the weights of
Snickers fun-size bars are normally distributed. A random sample of 9 bars is obtained
and their weights in grams are:
20.6 19.7 19.6 20.4 20.7 19.9 21.0 20.3 20.1
Test the hypothesis that the average weight fun-size Snickers bars is actually greater
than 20 grams.
Write out all 4 steps of the 4-step process. You may use Statcrunch to find the test
statistic (handwritten calculation of z, t, or p-value is NOT required), but copy all relevant
numbers needed to make your conclusion below.

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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