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BSTAT final pt. 2 Questions With Complete Solutions
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BSTAT final pt. 2 Questions With Complete Solutions
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BSTAT final pt. 2 Questions With Complete Solutions- does not effect multiple regression equation's ability to predict
the dependent variables Correct Answer multicollinearity
- there is a family of _________
-is continuous
- cannot be negative
- positively skewed
- asymptomic Correct Answer characteristics of f-distributions
- used to test whether two samples are from populations having
equal variances
- applied when we want to compare several population means
simultaneously Correct Answer F-Distribution
-A step-by-step method to determine a regression equation that
begins with a single independent variable and adds or deletes
independent variables one by one
-Only independent variables with nonzero regression
coefficients are included in the regression equation Correct
Answer stepwise regression
-differences among MEANS of continuous (numerical) variables
-more flexible than t-tests-->can analyze differences among
MORE THAN 2 groups (even if diff sample sizes) Correct
Answer ANOVA (analysis of variance)
1. A large home improvement store interested in the relationship
between....and the amount of display space allotted to the
fertilizer. The correlation...of 12 weeks was calculated to be .874
, using Pearsons correlation coefficient...hypothesis test to
determine if there is a positive association between
weekly...hypothesis would be?
a. B1=b2
b. B1=0
c. B1≠0
d. P=0
e. p≠0 Correct Answer d. P=0
1. A method of determining if there are differences between...
a. The Kruskal-Waillis Test
b. The Wilcoxon Rank-Sum test
c. The wilcoxon signed rank test
d. None of the above Correct Answer a. The Kruskal-Waillis
Test
1. A regression equation is generally used to:
a. Predict the value of the dependent variable for a given value
of the independent variable
b. Predict the value of the independent variable for a given value
of the dependent variable
c. Measure the strength of the association between two variables
d. All of the above Correct Answer a. Predict the value of the
dependent variable for a given value of the independent variable
1. An F test statistic is:
a. A standard error
b. A ratio of two variances
c. The difference between two or more means
d. A population parameter Correct Answer b. A ratio of two
variances
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