Thirty Data Points
Not what you're looking for?
Problem 1: Thirty Data Points
1. Thirty data points on Y and X are employed to estimate the parameters in the linear relation Y = a + bX. The computer output from the regression analysis is
DEPENDENT VARIABLE: Y R-SQUARE F-RATIO P-VALUE ON F
OBSERVATIONS: 30 0.3301 13.79 0.0009
VARIABLE PARAMETER STANDARD T-RATIO P-VALUE
ESTIMATE ERROR
INTERCEPT 93.54 46.210 2.02 0.0526
X -3.25 0.875 -3.71 0.0009
a. The equation of the sample regression line is Yˆ = _________________.
b. There are ______ degrees of freedom for the t-test. At the 1% level of significance, the critical t-value for the test is ______________.
c. At the 1% level of significance, aˆ __________ (is, is not) significant, and bˆ ________ (is, is not) significant.
d. At the 2% level of significance, the critical t-value for a t-test is ___________. At the 2% level of significance, ˆ a ____________ (is, is not) significant, and bˆ ____________ (is, is not) significant.
e. The p-value for bˆ indicates that the exact level of significance is ______ percent, which is the probability of _________________________________
f. At the 1% level of significance, the critical value of the F-statistic is __________. The model as a whole ______________(is, is not) significant at the 1% level.
g. If X equals 500, the fitted (or predicted) value of Y is __________________.
h. The percentage of the total variation in Y not explained by the regression is ______________ percent.
i. Explain why it is necessary to assess the statistical significance of the parameter estimates.
Purchase this Solution
Solution Summary
The expert examines the thirty data points in Microsoft Excel.
Solution Preview
Please see the attached file(s) for the complete tutorial. Thank you for the opportunity to be of assistance and of course, the opportunity to learn as well.
Anna, 108710
Problem 1: Thirty Data Points
1. Thirty data points on Y and X are employed to estimate the parameters in the linear relation Y = a + bX. The computer output from the regression analysis is
DEPENDENT VARIABLE: Y R-SQUARE F-RATIO P-VALUE ON F
OBSERVATIONS: 30 ...
Purchase this Solution
Free BrainMass Quizzes
Know Your Statistical Concepts
Each question is a choice-summary multiple choice question that presents you with a statistical concept and then 4 numbered statements. You must decide which (if any) of the numbered statements is/are true as they relate to the statistical concept.
Measures of Central Tendency
Tests knowledge of the three main measures of central tendency, including some simple calculation questions.
Measures of Central Tendency
This quiz evaluates the students understanding of the measures of central tendency seen in statistics. This quiz is specifically designed to incorporate the measures of central tendency as they relate to psychological research.
Terms and Definitions for Statistics
This quiz covers basic terms and definitions of statistics.