SAS EXAM QUESTIONS AND ANSWERS
A sample from a population should be which of the following? - Answers -representative
Which of the following is not a characteristic of predictive modeling? - Answers -
answers the question "How is X related to Y?"
The standard error measures the variability associated with the sample mean, x̄ . -
Answers -true
Select the statement below that incorrectly interprets a 95% confidence interval (15.02,
15.04) for the population mean, if the sample mean is 15.03 ounces. - Answers -The
probability is .95 that the true average weight is between 15.02 and 15.04 ounces.
How do you define the term power? - Answers -the measure of the ability of the
statistical hypothesis test to reject the null hypothesis when it is actually false
The location and spread of a normal distribution depend on the value of which two
parameters? - Answers -the mean (μ) and the standard deviation (σ)
Given the following SAS output, is there sufficient evidence to reject the hypothesis of
equal means?
SourceDFSum ofSquaresMeanSquaresF ValuePr >
FBrand10.030338160.0303381651.02<.001Error790.046384420.00059467Corrected
Total800.07672257 - Answers -yes
Dunnett's method compares all possible pairs of means - Answers -false
Which of the following phrases describes the model sums of squares, or SSM, in one-
way ANOVA? - Answers -the variability between the groups
Based on the following correlation matrix, what type of relationship do Performance and
RunTime have?
Pearson Correlation Coefficients, N = 31Prob > |r| under H0:
Rho=0PerformanceRunTimeAgePerformance1.00000-0.82049-
0.71257<.0001<.0001Error-0.820491.000000.19523<.00010.2926Corrected Total-
0.712570.195231.00000<.00010.2926 - Answers -a fairly strong, negative linear
relationship
In the simple linear regression model, what does β1 represent? - Answers -the slope
parameter
, Which of the following statements describes a positive linear relationship between two
variables?
The more I eat, the less I want to exercise.
The more salty snacks I eat, the more water I want to drink.
No matter how much I exercise, I still weigh the same. - Answers -2 only
What output does the following program produce?
proc corr data=stat1.bodyfat2 nosimple plots(only)=scatter(nvar=all); var Age Weight
Height; run; - Answers -a table of correlations and individual scatter plots for each
variable in the VAR statement
Given the following PROC REG output and assuming a significance level of 0.05, which
of the following statements is true? Select all that apply.
Analysis of VarianceSourceDFSum ofSquaresMeanSquaresF ValuePr >
FModel1119.72668119.726682.000.1585Error2501495959.83716Corrected
Total25115079
Root MSE7.73545R-Square0.0079Dependent Mean18.93849Adj R-Sq0.0040Coeff
Var40.84511
Parameter EstimatesVariableDFParameterEstimateStandardErrort ValuePr >|t|
Intercept132.165429.363503.440.0007Height1-0.188560.13330-1.410.1585 - Answers -
The model explains less than 1% of the variation in the response variable.
------------------------------------------------------------------- - Answers --
If you want to compare the average monthly spending for teenagers, adults, and senior
citizens, which statistical method should you choose? - Answers -one-way ANOVA
If you're trying to understand the relationship between age, weight, and running time,
what is your goal? - Answers -explanatory analysis
When you perform a two-way ANOVA in SAS, which of the following statements
correctly defines the model that includes the interaction between the two main effect
variables? - Answers -model Health=Drug Disease Drug*Disease;
A bank manager is concerned that the percent of loans processed that contain errors
has increased above the acceptable amount of 1%. A significance test is conducted to
test his concern (H0: loan error rate<=0.01, Ha: loan error rate>0.01).
The manager concludes that the rate is indeed above 1%, when in reality it is not. What
type of error did the manager make? - Answers -Type I
To reject a test with Student's t statistic, the t statistic should be far from 0 and have a
small corresponding p-value. - Answers -true
A sample from a population should be which of the following? - Answers -representative
Which of the following is not a characteristic of predictive modeling? - Answers -
answers the question "How is X related to Y?"
The standard error measures the variability associated with the sample mean, x̄ . -
Answers -true
Select the statement below that incorrectly interprets a 95% confidence interval (15.02,
15.04) for the population mean, if the sample mean is 15.03 ounces. - Answers -The
probability is .95 that the true average weight is between 15.02 and 15.04 ounces.
How do you define the term power? - Answers -the measure of the ability of the
statistical hypothesis test to reject the null hypothesis when it is actually false
The location and spread of a normal distribution depend on the value of which two
parameters? - Answers -the mean (μ) and the standard deviation (σ)
Given the following SAS output, is there sufficient evidence to reject the hypothesis of
equal means?
SourceDFSum ofSquaresMeanSquaresF ValuePr >
FBrand10.030338160.0303381651.02<.001Error790.046384420.00059467Corrected
Total800.07672257 - Answers -yes
Dunnett's method compares all possible pairs of means - Answers -false
Which of the following phrases describes the model sums of squares, or SSM, in one-
way ANOVA? - Answers -the variability between the groups
Based on the following correlation matrix, what type of relationship do Performance and
RunTime have?
Pearson Correlation Coefficients, N = 31Prob > |r| under H0:
Rho=0PerformanceRunTimeAgePerformance1.00000-0.82049-
0.71257<.0001<.0001Error-0.820491.000000.19523<.00010.2926Corrected Total-
0.712570.195231.00000<.00010.2926 - Answers -a fairly strong, negative linear
relationship
In the simple linear regression model, what does β1 represent? - Answers -the slope
parameter
, Which of the following statements describes a positive linear relationship between two
variables?
The more I eat, the less I want to exercise.
The more salty snacks I eat, the more water I want to drink.
No matter how much I exercise, I still weigh the same. - Answers -2 only
What output does the following program produce?
proc corr data=stat1.bodyfat2 nosimple plots(only)=scatter(nvar=all); var Age Weight
Height; run; - Answers -a table of correlations and individual scatter plots for each
variable in the VAR statement
Given the following PROC REG output and assuming a significance level of 0.05, which
of the following statements is true? Select all that apply.
Analysis of VarianceSourceDFSum ofSquaresMeanSquaresF ValuePr >
FModel1119.72668119.726682.000.1585Error2501495959.83716Corrected
Total25115079
Root MSE7.73545R-Square0.0079Dependent Mean18.93849Adj R-Sq0.0040Coeff
Var40.84511
Parameter EstimatesVariableDFParameterEstimateStandardErrort ValuePr >|t|
Intercept132.165429.363503.440.0007Height1-0.188560.13330-1.410.1585 - Answers -
The model explains less than 1% of the variation in the response variable.
------------------------------------------------------------------- - Answers --
If you want to compare the average monthly spending for teenagers, adults, and senior
citizens, which statistical method should you choose? - Answers -one-way ANOVA
If you're trying to understand the relationship between age, weight, and running time,
what is your goal? - Answers -explanatory analysis
When you perform a two-way ANOVA in SAS, which of the following statements
correctly defines the model that includes the interaction between the two main effect
variables? - Answers -model Health=Drug Disease Drug*Disease;
A bank manager is concerned that the percent of loans processed that contain errors
has increased above the acceptable amount of 1%. A significance test is conducted to
test his concern (H0: loan error rate<=0.01, Ha: loan error rate>0.01).
The manager concludes that the rate is indeed above 1%, when in reality it is not. What
type of error did the manager make? - Answers -Type I
To reject a test with Student's t statistic, the t statistic should be far from 0 and have a
small corresponding p-value. - Answers -true
