Americans tend to dine out multiple times per week. The number of times a sample of 20 families dined out last week provides the following data.72648414245235206742a. Compute the mean and median.Mean (to 2 decimals) Median (to 1 decimal) b. Compute the first and third quartiles. Round the answers to 2 decimal places, if necessary.First quartile Third quartile c. Compute the range and interquartile range. Round the answers to 2 decimal places, if necessary.Range Interquartile range d. Compute the variance and standard deviation. Round the answers to 2 decimal places.Variance Standard deviation f. Compute the lower limit and the upper limit (to 3 decimals and enter negative value as negative number.).lower limit:upper limit:

Given data : 72648414245235206742a. Compute the mean and median.Mean (to 2 decimals)3.9Median (to 1…

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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

Americans tend to dine out multiple times per week. The number of times a sample of 20 families dined out last week provides the following data.

7	2	6	4	8	4	1	4	2	4
5	2	3	5	2	0	6	7	4	2

a. Compute the mean and median.

Mean (to 2 decimals)
Median (to 1 decimal)

b. Compute the first and third quartiles. Round the answers to 2 decimal places, if necessary.

First quartile
Third quartile

c. Compute the range and interquartile range. Round the answers to 2 decimal places, if necessary.

Range
Interquartile range

d. Compute the variance and standard deviation. Round the answers to 2 decimal places.

Variance
Standard deviation

f. Compute the lower limit and the upper limit (to 3 decimals and enter negative value as negative number.).

lower limit:

upper limit:

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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