QMB 3200 EXAM 3
1. A graph of the standardized residuals plotted against values of the
normal scores that helps to determine whether the assumption that the
error term has a normal probability distribution appears to be valid is
called a: - CORRECT REPLY>>>-normal probability plot
2. The tests of significance in regression analysis are based on assumptions
about the error term ɛ . One such assumption is that the variance of ɛ,
denoted by 𝝈2, is: - CORRECT REPLY>>>-the same for all
values of x
3. identify independent and dependent variables between advertising and
sales - CORRECT REPLY>>>-The independent variable is the
advertising expenses, and the dependent variable is sales.
4. In regression analysis, the variable that is being predicted is the: -
CORRECT REPLY>>>-dependent variable
5. The tests of significance in regression analysis are based on assumptions
about the error term ɛ. One such assumption is that the error term
follows ɛ a(n) _____ distribution for all values of x - CORRECT
REPLY>>>-normal
, 6. Influential observations always: - CORRECT REPLY>>>-none
of the above
7. When studying the relationship between two quantitative variables, an
interval estimate of the mean value of y for a given value of x is called
a(n): - CORRECT REPLY>>>-confidence interval
8. When constructing a confidence or a prediction interval to quantify the
relationship between two quantitative variables, the appropriate degrees
of freedom are: - CORRECT REPLY>>>-n-2
9. The value of the coefficient of correlation (r): - CORRECT
REPLY>>>-can be equal to the value of the coefficient of
determination (r2).
10.An F test, based on the F probability distribution, can be used to test for:
- CORRECT REPLY>>>-significance in regression
11.The coefficient of determination: - CORRECT REPLY>>>-
cannot be negative
1. A graph of the standardized residuals plotted against values of the
normal scores that helps to determine whether the assumption that the
error term has a normal probability distribution appears to be valid is
called a: - CORRECT REPLY>>>-normal probability plot
2. The tests of significance in regression analysis are based on assumptions
about the error term ɛ . One such assumption is that the variance of ɛ,
denoted by 𝝈2, is: - CORRECT REPLY>>>-the same for all
values of x
3. identify independent and dependent variables between advertising and
sales - CORRECT REPLY>>>-The independent variable is the
advertising expenses, and the dependent variable is sales.
4. In regression analysis, the variable that is being predicted is the: -
CORRECT REPLY>>>-dependent variable
5. The tests of significance in regression analysis are based on assumptions
about the error term ɛ. One such assumption is that the error term
follows ɛ a(n) _____ distribution for all values of x - CORRECT
REPLY>>>-normal
, 6. Influential observations always: - CORRECT REPLY>>>-none
of the above
7. When studying the relationship between two quantitative variables, an
interval estimate of the mean value of y for a given value of x is called
a(n): - CORRECT REPLY>>>-confidence interval
8. When constructing a confidence or a prediction interval to quantify the
relationship between two quantitative variables, the appropriate degrees
of freedom are: - CORRECT REPLY>>>-n-2
9. The value of the coefficient of correlation (r): - CORRECT
REPLY>>>-can be equal to the value of the coefficient of
determination (r2).
10.An F test, based on the F probability distribution, can be used to test for:
- CORRECT REPLY>>>-significance in regression
11.The coefficient of determination: - CORRECT REPLY>>>-
cannot be negative
