Introduction to Statistics and Data Analysis
5th Edition
ISBN: 9781305445963
Author: PECK
Publisher: Cengage
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Chapter 14.2, Problem 30E
a.
To determine
Check whether there is a useful relationship between the response and the independent variables using the model utility test at the significance level 0.05.
b.
To determine
Calculate the values of
Interpret the values.
c.
To determine
Explain whether the regression model can be expected to give reasonably accurate predictions of the error percentage.
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A regression model to predict the price of diamonds included the following predictor variables: the weight of the stone (in carats where 1 carat = 0.2 gram), the color rating (D, E, F, G, H, or I), and the clarity rating (IF, VVS1, VVS2, VS1, or VS2). (a) Identify the quantitative predictor variable(s).
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A newspaper used an estimated regression equation to describe the relationship between y = error percentage for subjects reading a four-digit liquid crystal display and the independent variables x1 = level of backlight, x2 = character subtense, x3 = viewing angle, and x4 = level of ambient light. From a table given in the article, SSRegr = 21.6, SSResid = 22, and n = 30.
What is the value of the test statistic F
What is the P-value
What is r2
What is Se
An article used an estimated regression equation to describe the relationship between y = error percentage for subjects reading a four-digit liquid crystal display and the independent variables x1 = level of backlight, x2 = character subtense, x3 = viewing angle, and x4 = level of ambient light. From a table given in the article, SSRegr = 20.4, SSResid = 21, and n = 30.
Calculate the test statistic and calculate P- value. (Round your answer to two decimal places.)
F =
P- value=
Chapter 14 Solutions
Introduction to Statistics and Data Analysis
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