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Statistical Techniques in Business and Economics | 15th Edition | ISBN: 9780073401805 | Authors: Douglas Lind, William Marchal, Samuel Wathen
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Wachesaw Manufacturing Inc. produced the following number of units in the last 16 days

Chapter 0, Problem 11

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QUESTION:

Wachesaw Manufacturing Inc. produced the following number of units in the last 16 days.

This icon indicates that the data is available at the text website: www.mhhe.com/lind15e. You will be able to download the data directly into Excel or Minitab from this site.

\(\begin{array}{|llllllll|}
\hline 27 & 27 & 27 & 28 & 27 & 25 & 25 & 28 \\
26 & 28 & 26 & 28 & 31 & 30 & 26 & 26 \\
\hline
\end{array}\)

The information is to be organized into a frequency distribution.

a. How many classes would you recommend?

b. What class interval would you suggest?

c. What lower limit would you recommend for the first class?

d. Organize the information into a frequency distribution and determine the relative frequency distribution.

e. Comment on the shape of the distribution.

Questions & Answers

QUESTION:

Wachesaw Manufacturing Inc. produced the following number of units in the last 16 days.

This icon indicates that the data is available at the text website: www.mhhe.com/lind15e. You will be able to download the data directly into Excel or Minitab from this site.

\(\begin{array}{|llllllll|}
\hline 27 & 27 & 27 & 28 & 27 & 25 & 25 & 28 \\
26 & 28 & 26 & 28 & 31 & 30 & 26 & 26 \\
\hline
\end{array}\)

The information is to be organized into a frequency distribution.

a. How many classes would you recommend?

b. What class interval would you suggest?

c. What lower limit would you recommend for the first class?

d. Organize the information into a frequency distribution and determine the relative frequency distribution.

e. Comment on the shape of the distribution.

ANSWER:

Step 1 of 6

(a) If we consider k is the number of classes and n is the number of observations, then for class intervals, select the smallest k such that

\(2^{k}>n\)

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