Name: ________________KEY____________________
A
28 February 2011
IE330 Spring 2011
Quiz #4a
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Name: ________________KEY____________________
A
1.
(
TRUE or FALSE)
A 90% tolerance interval bounds 90% of the population.
2.
(
TRUE or FALSE)
For a simple linear regression model, we cannot use the
model if the pvalue for the regression coefficient is greater than 0.05.
3.
Suppose that for a particular set of data x
1
, x
2
, x
3
, the sample variance is s
2
= 0 and
the sample mean is
x
= 2.44. What is a 95% confidence interval on the mean?
(2.44, 2.44) – there is no variance in the sample.
4.
Consider the following regression, where 30 samples were taken to determine the
strength of a bond between two beams for a given concentration of a compound in
a particular brand of glue.
a.
Determine the pvalues missing from the regression below.
You do not
need to interpolate – you can state your answer as “< p”, where p is the
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 Spring '08
 Statistics, Econometrics, Linear Regression, Regression Analysis, Errors and residuals in statistics

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