BESC 3010 EXAM QUSTIONS WITH
ALL CORRECT ANSWERS GRADED
A+
Which of the following is always true for "statistically significant" results?
The p-value is higher than the alpha
None of these answers are true...
The null hypothesis is not rejected (i.e. retained)
The results are important - Answer-none of these answers are true
Committing a Type II error is defined as:
Setting the rejection region too lower
Including too many individuals in a sample
Not rejecting (i.e. retaining) the null hypothesis when it should have been rejected
Rejecting the null hypothesis when it should have been retained (i.e. not rejected). -
Answer-not rejecting (i.e. retaining) the null hypothesis when it should have been
rejected
What is the minimum level of measurement to calculate a Pearson's r correlation
coefficient?
Interval
Ordinal
Ratio
Nominal - Answer-interval
If r = .65, then the members in a sample who have values on the independent variable
have values on the dependent variable.
No relationship
Higher, lower
Lower, lower
Lower, higher - Answer-lower, lower
Correlations may not be interpretable for which type of relationship?
Direct
Nonlinear
All of these answers
Inverse - Answer-nonlinear
Which of the following illustrates a negative correlation?
The more often a person exercises, the more muscle mass they will accumulate
The more often a person visits the dentist, the fewer cavities they have
, As a person writes less, the quality of their writing decreases
The less often a person gets sick, the less sicks days they would need to take off work -
Answer-the more often a person visits the dentist, the fewer cavities they have
After a researcher rejects the null hypothesis, he or she needs to be aware of
Neither Type I nor Type II error
Type II error
Type I error
Both Type I and Type II error - Answer-type I error
If a data set is converted to z-scores, the new mean of the data set is:
1
3
0
-1 - Answer-0
If a data set is converted to z-scores, the new standard deviation of the data set is:
2
5
3
1 - Answer-1
Which z-score is closest to the mean?
-.6
-1.2
.02
3.3 - Answer-.02
A data set has a non-linear relationship between two variables. Which of the
calculations below are affected by this problem?
Means
Variances
Standard Deviations
Pearson's r - Answer-pearson's r
Which of the following is most sensitive to extreme scores?
Median
Yoda
Mode
Range - Answer-range
Which is the lowest level of measurement needed to calculate a mean?
Nominal
Ratio
Interval
Ordinal - Answer-interval
ALL CORRECT ANSWERS GRADED
A+
Which of the following is always true for "statistically significant" results?
The p-value is higher than the alpha
None of these answers are true...
The null hypothesis is not rejected (i.e. retained)
The results are important - Answer-none of these answers are true
Committing a Type II error is defined as:
Setting the rejection region too lower
Including too many individuals in a sample
Not rejecting (i.e. retaining) the null hypothesis when it should have been rejected
Rejecting the null hypothesis when it should have been retained (i.e. not rejected). -
Answer-not rejecting (i.e. retaining) the null hypothesis when it should have been
rejected
What is the minimum level of measurement to calculate a Pearson's r correlation
coefficient?
Interval
Ordinal
Ratio
Nominal - Answer-interval
If r = .65, then the members in a sample who have values on the independent variable
have values on the dependent variable.
No relationship
Higher, lower
Lower, lower
Lower, higher - Answer-lower, lower
Correlations may not be interpretable for which type of relationship?
Direct
Nonlinear
All of these answers
Inverse - Answer-nonlinear
Which of the following illustrates a negative correlation?
The more often a person exercises, the more muscle mass they will accumulate
The more often a person visits the dentist, the fewer cavities they have
, As a person writes less, the quality of their writing decreases
The less often a person gets sick, the less sicks days they would need to take off work -
Answer-the more often a person visits the dentist, the fewer cavities they have
After a researcher rejects the null hypothesis, he or she needs to be aware of
Neither Type I nor Type II error
Type II error
Type I error
Both Type I and Type II error - Answer-type I error
If a data set is converted to z-scores, the new mean of the data set is:
1
3
0
-1 - Answer-0
If a data set is converted to z-scores, the new standard deviation of the data set is:
2
5
3
1 - Answer-1
Which z-score is closest to the mean?
-.6
-1.2
.02
3.3 - Answer-.02
A data set has a non-linear relationship between two variables. Which of the
calculations below are affected by this problem?
Means
Variances
Standard Deviations
Pearson's r - Answer-pearson's r
Which of the following is most sensitive to extreme scores?
Median
Yoda
Mode
Range - Answer-range
Which is the lowest level of measurement needed to calculate a mean?
Nominal
Ratio
Interval
Ordinal - Answer-interval
