A company sells copiers and performs preventative maintenance and repair services. The manager wants to estimate how long it will take a service person to perform maintenance and repairs during a visit based on the number of copiers they need to service. Data were collected from 45 recent service calls, and regression analysis was performed in a statistics package, yielding the following results. Coef Stdev t-ratio Predictor Constant Number of Copiers 2.8039 0.4831 -0.5802 -0.2069 0.8371 15.0352 31.1233 0.0000 s = 8.9135 R-sq = 95.75% R-sq(adj) = 95.25% (a) What is the equation of the least-squares regression line? (b) Interpret the slope in context of the problem.

A company sells copiers and performs preventative maintenance and repair services. The manager wants to estimate how long it will take a service person to perform maintenance and repairs during a visit based on the number of copiers they need to service. Data were collected from 45 recent service calls, and regression analysis was performed in a statistics package, yielding the following results. Coef Stdev t-ratio Predictor Constant Number of Copiers 2.8039 0.4831 -0.5802 -0.2069 0.8371 15.0352 31.1233 0.0000 s = 8.9135 R-sq = 95.75% R-sq(adj) = 95.25% (a) What is the equation of the least-squares regression line? (b) Interpret the slope in context of the problem.

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MATLAB: An Introduction with Applications

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ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

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Contingency Table

A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.

Binomial Distribution

Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.

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2. A company sells copiers and performs preventative maintenance and repair services. The manager wants to
estimate how long it will take a service person to perform maintenance and repairs during a visit based on
the number of copiers they need to service. Data were collected from 45 recent service calls, and regression
analysis was performed in a statistics package, yielding the following results.
Predictor
Coef
Stdev
t-ratio
Constant
-0.5802
2.8039
-0.2069
0.8371
Number of Copiers
15.0352
0.4831
31.1233
0.0000
s= 8.9135
R-sq = 95.75%
R-sq(adj) = 95.25%
(a) What is the equation of the least-squares regression line?
(b) Interpret the slope in context of the problem.

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