Question

A statistical estimate of the standard deviation one would obtain from the distribution of an infinite number of estimates of the difference between the means of two groups is the ____.

Select one:

a.

standard error of the difference

b.

estimated error

c.

regression coefficient

d.

correction factor

Answer #1

**Standard deviation:** An indicator of the
variability of a set of scores in a sample around the mean of that
sample.

**Standard error:** The spread of the averages
around the average of averages in a sampling distribution.

**Standard error of the difference:** A statistical
estimate of the standard deviation one would obtain from the
distribution of an infinite number of estimates of the difference
between the mean of two groups.

**Regression coefficient:** is a statistical
measure of the average functional relationship between two or more
variables. In that one variable is considered dependent and other
one as independent.

**Correction factor:** A factor that is multiplied
with the result of an equation to correct for a known amount of
systematic error.

By looking at the above definition the correct answer will be
**standard error of the difference.**

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Select one:
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b. none of the above.
c. multiply the sample standard deviation times the square root
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Group of answer choices
1000
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50
100

Following is a simple linear regression model:
The following results were obtained from some statistical
software.
R2 = 0.523
syx (regression standard error) = 3.028
n (total observations) = 41
Significance level = 0.05 = 5%
Variable Parameter Estimate Std. Error of
Parameter Est.
Intercept 0.519 0.132
Slope of X -0.707 0.239
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d. 42 and 58

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