Answered: The college physical education…

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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The college physical education department offered an advanced first aid course last summer. The scores on the comprehensive final exam were normally distributed, and the z-scores for some of the students are shown below.

Robert	1.12
Juan	1.68
Haley	−2.06
Joel	0.00
Jan	−0.68
Linda	1.50

(a)

Which of these students scored above the mean? (Select all that apply.)

Robert

Juan

Haley

Joel

Jan

Linda

(b)

Which of these students scored on the mean? (Select all that apply.)

Robert

Juan

Haley

Joel

Jan

Linda

(c)

Which of these students scored below the mean? (Select all that apply.)

Robert

Juan

Haley

Joel

Jan

Linda

(d)

If the mean score was μ = 144 with standard deviation σ = 21, what was the final exam score for each student? (Round your answers to the nearest whole number.)

Robert

Juan

Haley

Joel

Jan

Linda

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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