Question

In: Statistics and Probability

18) The ratio of the regression coefficient to its standard error is called: A) t-statistic. B)...

18) The ratio of the regression coefficient to its standard error is called:
A) t-statistic.
B) F-statistic.
C) partial F-statistic.
D) coefficient of determination.
Answer:
19) The range of values in which we can be confident that the true regression coefficient lies within a given degree of probability is called a:
A) prediction interval.
B) confidence interval.
C) logistic regression.
D) none of the above.
Answer:
20) The estimated regression equation is Y = 10 + 2.5X, if X =0 than the predicted value of Y is equal to:
A) 12.5
B) 10
C) 2.5
D) 7.5
Answer:

Solutions

Expert Solution

The ratio of the regression coefficient to its standard error is called t- statistics . As from the formulae for calculating t value we can directly find that it is the ratio of regression coefficient mean1- mean2 to standard error.

In next question to obtain a prediction interval we first plough the regression equation and then predict the range.

To calculate the value of Y from the regression equation we need to substitute the value of x=0 in the regression equation.

orchestra answered 2 years ago
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