Answered: Empirical attention span studies…

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

Empirical attention span studies established that college students’ attention span is normally distributed for about 20 ± 2.5 minutes (µ ± σ). However, during Covid-19 pandemic, many studies reported that college students’ attention span has been shorten. To verify this information, a neuropsychologist conducts an experiment to measure the attention span for a sample of college students. The data were recorded as below:

9, 10, 12, 17, 19, 20, 13, 15, 14, 11

A- What is the dependent variable?

B- What is the level of measurement of the dependent variable?

c- Is there a significant difference in attention span between the sample and the general college student population? Test at the alpha = .01 level.

D- Compute Cohen’s d

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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