STAT. TECH. IN BUSINESS + ECON LOOSELEAF
STAT. TECH. IN BUSINESS + ECON LOOSELEAF
18th Edition
ISBN: 9781264261765
Author: Lind
Publisher: MCG
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Chapter 13, Problem 47CE

(a)

To determine

To create: The scatterplot of the Population City and Median Age, and comment on the observation.

(b)

To determine

To calculate: The correlation coefficient between the variables, and interpret the results.

(c)

To determine

To obtain: A complete regression analysis and report and interpret the coefficient of determination.

(d)

To determine

To write: The regression equation to predict median age.

(e)

To determine

If the slope is significantly different from zero or not with reason.

(f)

To determine

To summarize: The results from the previous parts.

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A well-known company predominantly makes flat pack furniture for students. Variability with the automated machinery means the wood components are cut with a standard deviation in length of 0.45 mm. After they are cut the components are measured. If their length is more than 1.2 mm from the required length, the components are rejected. a) Calculate the percentage of components that get rejected. b) In a manufacturing run of 1000 units, how many are expected to be rejected? c) The company wishes to install more accurate equipment in order to reduce the rejection rate by one-half, using the same ±1.2mm rejection criterion. Calculate the maximum acceptable standard deviation of the new process.
5. Let X and Y be independent random variables and let the superscripts denote symmetrization (recall Sect. 3.6). Show that (X + Y) X+ys.
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Chapter 13 Solutions

STAT. TECH. IN BUSINESS + ECON LOOSELEAF

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