A one-sample t value is statistically significant in which situation?
Question 1A one-sample t value is statistically significant in which situation?
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
Question 2What is the similarity between the z test and the one-sample t-test?
They both analyze differences between sample means
They both analyze differences between a sample and a population
They both determine the strength of the relationship between variables
They both rely on ordinal scale data
Question 3Turning raw scores into z scores accomplishes all of the following except which?
Allows for scores from different tests to be compared directly
Creates a common distribution where the mean is 0
Creates a common distribution where the standard deviation is 1.0
Makes the data involved in the transformation normal
Question 4The independent variable in either a before/after t
or a within subjects F is always of what data scale?
Nominal
Ordinal
Interval
Ratio
Question 5Which lower-case letter is usually used to represent a correlation coefficient?
n
r
p
z
Question 6How is the z-test different from z-score analysis?
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
Question 7More widely scattered points in the scatter-plot indicate which?
More variability in the x
variable
More variability in the y
variable
Normality in both variables
Weaker relationships between variables
Question 8Each point in a scatter plot represents which of the following?
A predicted value
A measure of either the x or the y variable
The group to which the measure belongs
The measure of both variables
Question 9The chi-square test of independence has how many variables?
1
2
3
unlimited
Question 10A type II decision error occurs in which of the following circumstances?
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
Question 11Rejecting the null hypothesis is the same as saying which?
Any differences are random differences
The result is statistically significant
The hypothesis of difference is rejected
The research hypothesis is rejected
Question 12In the set of numbers 2, 3, 3, 4, 4, 4, 5, 5, 6, which is the median?
3
4
5
6
Question 13Another name for nominal data is _____.
continuous
categorical
open-ended
parametric
Question 14Which of the following defines the intercept value in a regression solution?
The value of y when x = 0
The degree of error in the prediction
The negative impact of x on y
The change in y from +1.0 in x
Question 15Which of the following is not a measure of central tendency?
Mean
Range
Median
Mode
Question 16How are degrees of freedom related to critical values of rxy?
Critical values increase in direct proportion to degrees of freedom
Critical values decline as degrees of freedom increase
Critical values are such that significance is difficult to establish with large samples
Critical values allow degrees of freedom to be ignored in large samples
Question 17What is the normality requirement for ordinary least squares regression?
Both variables must be drawn from samples which are ordinal
The solution must fit a normal distribution
The populations from which the samples come must be normal
Ordinary least square regression has no normality requirement
Question 18The answer to which question defines the coefficient of determination, r2?
What is the statistical relationship between x and y?
How linear is the relationship between xand y?
How much of y can be explained by changes in x?
What is the variation in the x/yrelationship due to chance?
Question 19The range of possible correlation values for the Pearson Correlation is which?
From 0 to 1.0
From 0 to 10.0
From -.5 to +.5
From -1.0 to +1.0
Question 20Grouping people by their political party membership constitutes data of what scale?
Nominal
Ordinal
Interval
Ratio
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