Answered: Student Gender Hours online/week…

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

Student Gender Hours online/week Friends
1 female 12 110
2 male 5 250
3 female 6 240
4 female 2 50
5 male 4 120
6 female 5 60
7 female 8 340
8 female 7 170
9 male 4 50
10 female 6 80
11 female 4 150
12 male 8 430
13 male 6 150
14 male 3 200
15 female 12 380
16 female 4 50
17 male 6 180
18 male 10 450
19 female 5 70
20 male 7 120
21 female 4 280

The mean for the number of hours online per week is?

(Type an integer or a decimal rounded to two decimal places as needed.)

Definition Definition Measure of central tendency that is the average of a given data set. The mean value is evaluated as the quotient of the sum of all observations by the sample size. The mean, in contrast to a median, is affected by extreme values. Very large or very small values can distract the mean from the center of the data. Arithmetic mean: The most common type of mean is the arithmetic mean. It is evaluated using the formula: μ = 1 N ∑ i = 1 N x i Other types of means are the geometric mean, logarithmic mean, and harmonic mean. Geometric mean: The nth root of the product of n observations from a data set is defined as the geometric mean of the set: G = x 1 x 2 ... x n n Logarithmic mean: The difference of the natural logarithms of the two numbers, divided by the difference between the numbers is the logarithmic mean of the two numbers. The logarithmic mean is used particularly in heat transfer and mass transfer. ln x 2 − ln x 1 x 2 − x 1 Harmonic mean: The inverse of the arithmetic mean of the inverses of all the numbers in a data set is the harmonic mean of the data. 1 1 x 1 + 1 x 2 + ...

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