Question description

How is the z-test different
from z-score analysis? (Points : 1)

 
The z-test compares a sample to a population.
 
The z-test calculates a value of z which can be compared to Table A.
 
The z-test provides a way to evaluate how individuals compare to a
population.
 
The z-test is based on how individual scores compare to a sample mean.

A one-sample t value is
statistically significant in which situation? (Points : 1)

 
The calculated t is equal to or larger than the table value.
 
The calculated t is equal to or smaller than the table value.
 
The calculated t is equal to or smaller than .05.
 
The calculated t is equal to or larger than .05.

What advantage does the one-sample
t offer over the z-test? (Points : 1)

 
The one sample t requires no parameter standard error of the mean.
 
The one sample t requires no parameter mean.
 
The one sample t requires no sample mean.
 
The one sample t doesn’t require interval scale data.

Consulting Table 3.1, what
percentage of the distribution occurs below z = 1.0? (Points : 1)

 
15.87%
 
34.13%
 
50%
 
84.13%

The Cohen’s d has an upper
limit of 1.0. (Points : 1)

 
True
 
False

What does Cohen’s d measure
in the independent t-test? (Points : 1)

 
Whether a result is a random outcome
 
The effect size of the result
 
The direction of the difference
 
The impact of the dependent variable

The z-test asks whether the
population from which the sample was drawn has the same mean as the
population to which it is compared. (Points : 1)

 
True
 
False

Which of the following expressions
is an indication of sampling error? (Points : 1)

 M =
m
 x – M
 s
 M ≠ mM

A type I decision error occurs in
which of the following circumstances? (Points : 1)

 
The decision not to proceed with an analysis
 
The decision to proceed when the analysis is flawed
 
Erroneously determining that a result is not significant
 
Erroneously determining that a result is significant

In a distribution for which the
mean is 25 and the standard deviation is 5, what percentage of all scores
occur at 30 or above? (Points : 1)

 
15.87%
 
20%
 
34.13%
 
84.13%

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