Answered: Groups: 1 = 5-25 years, 2 = 26-59…

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

Groups: 1 = 5-25 years, 2 = 26-59 years, 3 = 60-92 years

Which of the following statements is true of Group 2’s mean FIQ score?

Group of answer choices:

1. Group 2’s mean FIQ score is different from the mean FIQ scores of Groups 1 and 3

2. Group 2’s mean FIQ score is not different from the mean FIQ scores of Groups 1 and 3

3. Group 2’s mean FIQ score is significantly higher than the mean FIQ score of Group 1 but is significantly lower than the mean FIQ score of Group 3

4. Group 2’s mean FIQ score is not different from the mean FIQ score of Group 1 but is significantly higher than the mean FIQ score of Group 3

5. Group 2’s mean FIQ score is not different from the mean FIQ score of Group 1 but is significantly lower than the mean FIQ score of Group 3

6. None of the above

Post Hoc Tests
Multiple Comparisons
Dependent Variable: WAIS-R full scale 10
LSD
Mean
95% Confidence interval
Difference (I-
J)
O Subjects age in years
() Subjects age in years
Std. Error
Sig.
Lower Bound Upper Bound
5-25 Years
26-59 Years
-1.257
1.115
260
-3,44
.93
60-92 Years
-5.254
1.293
<.001
-7.79
-2.72
26-59 Years
5-25 Years
1.257
1.115
260
-.93
3.44
60-92 Years
-3.997
1.115
< 001
-6.19
-1.81
60-92 Years
5-25 Years
5.254
1.293
<001
2.72
7.79
26-59 Years
3.997
1.115
<001
1.81
6.19
*. The mean difference is significant at the 0.05 level.

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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