Answered: A nutritionist claims that individuals…

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 nutritionist claims that individuals tend to report decreasing
dietary intake the more they are interviewed. To investigate this
claim, a random sample of eight female university students was
asked to record their dietary intake for two consecutive days. An
analysis on their total dietary intake (in kcal) gave the following
results:

(Check image)

Assume that the differences in total dietary intake are normally
distributed. Using a 5% level of significance, test the claim that a
higher dietary intake is observed on day 1.

3 4
6 | 7
Student
1
2
5
8
Day 1
1905
2237
1863
2291
2211
1428
1062
1705
Day 2
1658
1479
1100
2116
1999
1097
1283
2424

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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