Statistics 001 - Elementary Statistics I for the Social Sciences » Fall 2019 » Review Materials 3

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Question #1
Correlational studies are always two-tailed. 
A.   TRUE
B.   FALSE
Question #2
When listing the hypotheses for  Pearson r, we use ______ instead of mew. 
A.   rho
B.   standard error of the mean
C.   mean
D.   standard deviation
Question #3
As a researcher hypothesizing a nondirectional relationship between two variables, you expect the Pearson r to be:
A.   zero
B.   on the negative side
C.   on the positive side
D.   not near zero
Question #4
The Pearson Correlational Coefficient (r) is to be used when both variables are:
A.   Qualitative
B.   Categorical
C.   Quantitative and Qualitative
D.   Quantitative
Question #5
Unlike with an experimental study, the variables in a correlational study are not manipulated by the researcher.
A.   FALSE
B.   TRUE
Question #6
The less Joe studies (number of minutes per day), the lower his GPA is. What type of relationship would this be?
A.   positive
B.   curvilinear
C.   no relationship
D.   negative
Question #7
Using alpha .05, what's the critical value for a study that has 4 levels in the IV and 15 subjects?
A.   3.056
B.   3.357
C.   3.587
D.   3.287
Question #8
Using alpha .05, how many subjects and how many levels are there if the critical value is 3.025 
A.   15 subjects, 6 levels
B.   19 subjects, 6 levels
C.   neither answer is correct
D.   20 subjects, 4 levels
Question #9
We must _________ the averages of two sample to see if there is an honestly significant difference. If the difference is _______ than HSD, we would say there is an honestly significant difference.  
A.   subtract, less
B.   add, greater
C.   add, less
D.   subtract, greater
Question #10
When doing an Analysis of Variance, what's the terminology for independent samples?
A.   Between-Subjects
B.   ANOVA
C.   One-Way
D.   Level
Question #11
When we have three or more groups, why is it not appropriate to do multiple t-tests instead of ANOVA?
A.   runaway alpha
B.   sample size
C.   Post-Hoc test
D.   degrees of freedom
Question #12
Which of the following sources of variability is guaranteed to exist in a study?
A.   ANOVA
B.   Between-Group
C.   Within-Group
D.   Neither answer is correct
Question #13
As a researcher using ANOVA, in order to reject the null hypothesis, we need the F ratio to be:
A.   greater than 1
B.   0
C.   -1
D.   1
Question #14
ANOVA can be two-tailed or one-tailed.
A.   TRUE
B.   FALSE
Question #15
A researcher is investigating academic motivation among college students and their siblings. This type of study would be _______ 
A.   z -test
B.   independent samples t-test
C.   paired samples t-test
D.   neither answer is correct
Question #16
Which of the following assumptions MUST be met in order for a t-test to be conducted?
A.   Independence of observations
B.   Normality
C.   Random samples
D.   Homogeneity of variance
Question #17
Dr. Rivera believes that mood disorder is less prevalent among older adults than it is among young adults.   
A.   H0: μYoung < μOlder
B.   H1: μYoung > μOlder
C.   H0: μYoung > μOlder
D.   H1: μYoung < μOlder
Question #18
Dr. Rivera believes that mood disorder is less prevalent among older adults than it is among young adults. What is the correct null hypothesis?  
A.   H1: μYoung ≤ μOlder
B.   H0: μYoung < μOlder
C.   H1: μYoung < μOlder
D.   H0: μYoung ≤ μOlder
Question #19
A hypothesis is a statement or prediction about a sample value.
A.   TRUE
B.   FALSE
Question #20
Which of the two hypotheses is the researcher always testing to reject or not?
A.   Null
B.   Alternative
C.   Both
Question #21
Which assumption must be met in order for a statistician to proceed with the analysis?
A.   Neither answer is correct
B.   Robust and Nonrobust
C.   Nonrobust
D.   Robust

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