Answered: A Deputy Registrar (Human resources) at…

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 Deputy Registrar (Human resources) at a certain University is concerned about employee absenteeism among academic staff. She believes that organisation commitment is probably the most significant contributing factor. She selected a random sample of 31 employee files and noted their level of absenteeism (in days p.a.). She sent a confidential questionnaire to each of the selected employees from which an organisation commitment index was derived. ’. You are required to do the following:

1.4: Obtain a 95% confidence interval estimate of the mean difference in level of organisation commitment. Does the interval estimate suggest a significant difference in level of commitment between the two groups of academics? Justify your answer

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Question One
1.2
Descriptives
MBAZ504 Assignment 2 -Additional Information (Prof. William Phiri Abwino -Course
Lecturer)
N
Missing
Mean
Median
Standard deviation
Range
Minimum
Maximum
LAbsence
low
high
low
high
low
high
low
high
low
high
low
high
low
high
low
high
Commitment
9
22
0
0
70.1
44.2
70
42.5
8.34
12.7
24
50
0
58
19
82
69
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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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