Answered: cognitive psychologist was interested…

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 cognitive psychologist was interested in how long it took for college students to memorize a list of formulas (and recite without error) for their statistics exam. The times it took for six students were 45 , 30 , 42, 45, 41, and 43 minutes.
Provide all answers to the nearest two decimal points:
Compute the mean, median, and mode.
Based on the measures of central tendency, what can you infer about the distribution (skewness)
Compute the range.

Definition Definition Middle value of a data set. The median divides a data set into two halves, and it also called the 50th percentile. The median is much less affected by outliers and skewed data than the mean. If the number of elements in a dataset is odd, then the middlemost element of the data arranged in ascending or descending order is the median. If the number of elements in the dataset is even, the average of the two central elements of the arranged data is the median of the set. For example, if a dataset has five items—12, 13, 21, 27, 31—the median is the third item in ascending order, or 21. If a dataset has six items—12, 13, 21, 27, 31, 33—the median is the average of the third (21) and fourth (27) items. It is calculated as follows: (21 + 27) / 2 = 24.

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