Multiple Choice Flashcards
Multiple choice (21 cards)
Although Research questions usually concern a _______, the actual research is typically conducted with a ________.
a) sample, statistic
b) population, parameter
c) sample, population
d) population, sample
D
A researcher is interested in the eating behaviour of rats and selects a group of 25 rats to be tested in a research study. The average score for the group of 25 rats is an example of a ______.
a) sample
b) statistic
c) population
d) parameter
B
A researcher conducts an experiment to determine whether moderate doses of St. Johns Wort have any effect of memory for college students. For this study, what is the Independent Variable?
a) the amount of St. John’s Wort given to each participant
b) the memory score for each participant
c) the group of college students
d) cannot answer without more information
A (the IV is manipulated by the researcher)
One group of new freshmen is given a study-skills training course during the first week of college and a second group does not receive the course. At the end of the semester, the grade point average is recorded for each student. For this study, what is the DV?
a) receiving or not receiving the course
b) the GPA for each student
c) the group that received the training course
d) the group that did not receive the course
B
A researcher wants to examine the relationship between sleeping habits and GPAs. A group of 100 students is selected and each student is asked to report the average numbers of hours slept and GPA. What research method is being used in this study?
a) experimental
b) correlational
c) non-experimental method comparing two groups
d) none of the above
B
In a study evaluating the effectiveness of a new medication designed to control HBP, one sample of individuals is given the medicine and a second sample is given an inactive placebo. BP is measured. For this study, what is the DV?
a) medication
b) placebo
c) BP
d) individuals
C
A typical experimental research study
a) measures 1 variable for each participant and uses only 1 group
b) measures 2 variables for each participant and uses only 1 group
c) measures 1 variable for each participant and uses only 2 groups of scores
d) measures 2 variable for each participant and uses only 2 groups of scores
C ( 1 IV - groups, 1 DV - scores)
To determine the size of the difference b/w 2 measurements, a researcher must use a(n) __________ scale of measurement
a) nominal
b) nominal or ordinal
c) ratio
d) ratio or interval
D
Determining the class standing (1st, 2nd) for the graduating seniors would involve measuring on a(n) ______ scale of measurement.
a) nominal
b) ordinal
c) interval
d) ratio
B
Which of the following is an example of a discrete variable?
a) height
b) reaction time
c) number of siblings
d) age
C (only whole numbers)
Real limits are an important consideration when measuring a _______ variable.
a) ratio scale
b) ratio or interval scale
c) discrete
d) continuous
D (divided into interval with real limits)
What is the final step to be performed when computing ∑(X-2)^2?
a) square each value
b) subtract 2 points from each score
c) sum the squared values
d) subtract 2^2 from each X^2 value
C
What is the value of (∑X)^2 for the following scores? 1,5,2
a) 10
b) 16
c) 30
d) 64
D
What is the value of ∑(X+1) for the following 2,0,4,2
a) 9
b) 11
c) 12
d) 36
C
You are instructed to add 1 point to each score, then square the resulting values, and then find the sum of the squared numbers.
a) (∑X+1)^2
b) ∑(X+1)^2
c) ∑(X^2+1)
d) ∑X^2+1
B
For nominal data, what measure of central tendency is used?
a) Median
b) Mean
c) Mode
d) none
C
For ordinal data, what measure of central tendency is used?
a) Median
b) Mean
c) Mode
d) none
A
For interval data that is symmetrical, what measure of central tendency is used?
a) Median
b) Mean
c) Mode
d) none
B
For interval data that is skewed, what measure of central tendency is used?
a) Median
b) Mean
c) Mode
d) none
A
For ordinal data, what measure of variability is used?
a) standard deviation
b) the linear model
c) interquartile range
d) none of the above
B
For interval data, what measure of variability is used?
a) standard deviation
b) the linear model
c) interquartile range
d) none of the above
A
