Answered: In an investigation of possible brain…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

In an investigation of possible brain damage due to alcoholism, an x-ray procedure known as a computer assisted tomography (CAT) scan was used to measure brain densities in 8 chronic alcoholics. For each alcoholic, a nonalcoholic control was selected who matched the alcoholic on age, sex, race, height, and other factors. The brain density measurements on the alcoholics and the matched controls are recorded below. Assume normally distributed data here.

Use an appropriate test to determine whether there is evidence of diminished brain density due to chronic alcoholism.

The table represents a comparison between two groups, labeled as "Alcoholic" and "Control," across eight pairs.

| Pair | Alcoholic | Control |
|------|-----------|---------|
| 1 | 40 | 42 |
| 2 | 38 | 40 |
| 3 | 36 | 37 |
| 4 | 41 | 46 |
| 5 | 40 | 43 |
| 6 | 42 | 42 |
| 7 | 39 | 43 |
| 8 | 45 | 44 |

This table could be used to analyze differences in scores or measurements between the Alcoholic and Control groups. Each row presents a pair with corresponding values for both groups, which can be used for statistical analysis or comparison purposes.

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.

Expert Solution

Trending now

This is a popular solution!

Step by step

Solved in 3 steps with 1 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

$Hypothesis Tests and Confidence Intervals for Equality of Variances$

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, statistics and related others by exploring similar questions and additional content below.

Similar questions