PSY325: Statistics for the Behavioral & Social Sciences 10 question quiz

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Question Description

I’m working on a Statistics question and need guidance to help me study.

 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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