Answered: Mr. Moore's physics class built…

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

Related questions

Question

Mr. Moore's physics class built different-shaped parachutes to see which shapes were more effective. The students tested the parachutes by dropping them from a height of 30 feet and timing the fall. They calculated the summary below:

Mean	Std Dev	Min	Q1	Median	Q3	Max
5.6 secs	0.6 sec	3.3 secs	4.5 secs	4.8 secs	5.2 secs	7.8 secs

The students wanted to see what happens to their times when they drop the parachutes from 45 feet. They find that every drop is increased by 2.5 seconds. Find the new mean and standard deviation.

Mean, 3.1 seconds; standard deviation, 0.6 second

Mean, 5.6 seconds; standard deviation, 3.1 seconds

Mean, 5.6 seconds; standard deviation, −1.9 seconds

or Mean, 8.1 seconds; standard deviation, 0.6 second

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.

Expert Solution