Applied Statistics in Business and Economics with Connect Access Card with LearnSmart
Applied Statistics in Business and Economics with Connect Access Card with LearnSmart
5th Edition
ISBN: 9781259396656
Author: David Doane, Lori Seward Senior Instructor of Operations Management
Publisher: McGraw-Hill Education
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Chapter 4.2, Problem 12SE

a.

To determine

Find the median, midrange and geometric mean of the Exam scores of 9 students.

a.

Expert Solution
Check Mark

Answer to Problem 12SE

The median of the Exam scores of 9 students is 68.

The geometric mean of the Exam scores of 9 students is 67.37013.

The midrange of the Exam scores of 9 students is 68.

Explanation of Solution

The Exam scores of 9 students is given.

Measures of center:

  • Median is the middle value in an ordered sequence of data.
  • Geometric mean is the multiplication all the data values in the sample by taking nth root of the product and will be affected in the case of zeros and negative values in the observation.
  • Midrange is the point between the lowest and highest values of X that occurs in halfway.

Median:

Software procedure:

Step-by-step software procedure to obtain Median using EXCEL software is as follows:

  • Open an EXCEL file.
  • Enter the data in the column J in cells J1 to J9.
  • In cell A1, enter the formula “=MEDIAN(J1:J9)”.
  • Output using EXCEL software is given below:

Applied Statistics in Business and Economics with Connect Access Card with LearnSmart, Chapter 4.2, Problem 12SE , additional homework tip  1

Thus, the median is 68.

Geometric mean:

Software procedure:

Step-by-step software procedure to obtain Geometric mean using EXCEL software is as follows:

  • Open an EXCEL file.
  • Enter the data in the column J in cells J1 to J9.
  • In cell A1, enter the formula “=GEOMEAN(J1:J9)”.
  • Output using EXCEL software is given below:

Applied Statistics in Business and Economics with Connect Access Card with LearnSmart, Chapter 4.2, Problem 12SE , additional homework tip  2

Thus, the geometric mean is 67.37013.

Midrange:

Software procedure:

Step-by-step software procedure to obtain Midrange using EXCEL software is as follows:

  • Open an EXCEL file.
  • Enter the data in the column J in cells J1 to J9.
  • In cell A1, enter the formula “=(MIN(J1:J9)”+MAX(J1:J9))/2”.
  • Output using EXCEL software is given below:

Applied Statistics in Business and Economics with Connect Access Card with LearnSmart, Chapter 4.2, Problem 12SE , additional homework tip  3

  • Thus, the midrange is 68.

b.

To determine

Decide whether the given measures are reasonable measures of center tendency.

b.

Expert Solution
Check Mark

Answer to Problem 12SE

Yes, the given measures are reasonable measures of center tendency.

Explanation of Solution

From the data, it is observed that there occurs one extreme value. Median and mid-range has similar values. However, mid-range is influenced by the extreme values. In this context, all the measures like median, midrange and geometric mean have the nearer values. So, it is assumed to be acceptable.

Hence, the given measures are reasonable measures of center tendency.

 A (b).

To determine

Find the median, midrange and geometric mean of the GPAs of 8 students.

 A (b).

Expert Solution
Check Mark

Answer to Problem 12SE

The median of the GPAs of 8 students is 3.03.

The geometric mean of the GPAs of 8 students is 3.009403.

The midrange of the GPAs of 8 students is 2.955.

Explanation of Solution

The GPAs of 8 students is given.

Median:

Software procedure:

Step-by-step software procedure to obtain Median using EXCEL software is as follows:

  • Open an EXCEL file.
  • Enter the data in the column K in cells K1 to K8.
  • In cell A1, enter the formula “=MEDIAN(K1:K8)”.
  • Output using EXCEL software is given below:

Applied Statistics in Business and Economics with Connect Access Card with LearnSmart, Chapter 4.2, Problem 12SE , additional homework tip  4

Thus, the median is 3.03.

Geometric mean:

Software procedure:

Step-by-step software procedure to obtain Geometric mean using EXCEL software is as follows:

  • Open an EXCEL file.
  • Enter the data in the column K in cells K1 to K8.
  • In cell A1, enter the formula “=GEOMEAN(K1:K8)”.
  • Output using EXCEL software is given below:

Applied Statistics in Business and Economics with Connect Access Card with LearnSmart, Chapter 4.2, Problem 12SE , additional homework tip  5

Thus, the geometric mean is 3.009403.

Midrange:

Software procedure:

Step-by-step software procedure to obtain Midrange using EXCEL software is as follows:

  • Open an EXCEL file.
  • Enter the data in the column K in cells K1 to K8.
  • In cell A1, enter the formula “=(MIN(K1:K8)+MAX(K1:K8))/2”.
  • Output using EXCEL software is given below:

Applied Statistics in Business and Economics with Connect Access Card with LearnSmart, Chapter 4.2, Problem 12SE , additional homework tip  6

  • Thus, the midrange is 2.955.

b.

To determine

Decide whether the given measures are reasonable measures of center tendency.

b.

Expert Solution
Check Mark

Answer to Problem 12SE

Yes, the given measures are reasonable measures of center tendency.

Explanation of Solution

From the data, it is observed that there occurs no extreme value. Median and mid-range has similar values. In this context, all the measures like median, midrange and geometric mean have values nearer to each other. So, it is assumed to be acceptable.

Hence, the given measures are reasonable measures of center tendency.

a.

To determine

Find the median, midrange and geometric mean of the class absences of 12 students.

a.

Expert Solution
Check Mark

Answer to Problem 12SE

The median of the class absences of 12 students is 1.5.

The Geometric mean of the class absences of 12 students is not applicable.

The midrange of the class absences of 12 students is 7.5.

Explanation of Solution

The class absence of 12 students is given.

Median:

Software procedure:

Step-by-step software procedure to obtain Median using EXCEL software is as follows:

  • Open an EXCEL file.
  • Enter the data in the column L in cells L1 to L12.
  • In cell A1, enter the formula “=MEDIAN(L1:L12)”.
  • Output using EXCEL software is given below:

Applied Statistics in Business and Economics with Connect Access Card with LearnSmart, Chapter 4.2, Problem 12SE , additional homework tip  7

Thus, the median is 1.5.

Geometric mean:

Here, the observations contain zero. As a result, the geometric mean is not applicable.

Midrange:

Software procedure:

Step-by-step software procedure to obtain Midrange using EXCEL software is as follows:

  • Open an EXCEL file.
  • Enter the data in the column L in cells L1 to L12.
  • In cell A1, enter the formula “=(MIN(L1:L12)+MAX(L1:L12))/2”.
  • Output using EXCEL software is given below:

Applied Statistics in Business and Economics with Connect Access Card with LearnSmart, Chapter 4.2, Problem 12SE , additional homework tip  8

  • Thus, the midrange is 7.5.

b.

To determine

Decide whether the given measures are reasonable measures of center tendency.

b.

Expert Solution
Check Mark

Answer to Problem 12SE

No, the given measures are not all reasonable measures of center tendency

Explanation of Solution

From the data, it is observed that there occurs one extreme value, 15. Median and mid-range have extremely different values. The value of the geometric mean is not defined. So, the measures are not acceptable.

Hence, the given measures are not reasonable measures of center tendency.

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Chapter 4 Solutions

Applied Statistics in Business and Economics with Connect Access Card with LearnSmart

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