A box office analyst seeks to predict opening weekend box office gross for movies. Toward this goal, the analyst plans to use YouTube trailer views as a predictor. For each of 66 movies, the you Tube trailer view count, the number of You Tube trailer viewer from the release of the trailer through the Saturday before a movie opens, and the opening weekend box office gross (in $millions) are collected and stored in Movie. For these data, a. Construct a scatter plot . b. Assuming a linear relationship, use the least-squares method to determine the regressions coefficients b 0 and b 1 . c. Interpret the meaning of the slope, b 1 , in this problem. d. Predict the mean weekend box office gross for a movie that had 20 million You Tube trailer views. e. What conclusions can you reach about predicting weekend box office gross from You Tube trailer views?
A box office analyst seeks to predict opening weekend box office gross for movies. Toward this goal, the analyst plans to use YouTube trailer views as a predictor. For each of 66 movies, the you Tube trailer view count, the number of You Tube trailer viewer from the release of the trailer through the Saturday before a movie opens, and the opening weekend box office gross (in $millions) are collected and stored in Movie. For these data, a. Construct a scatter plot . b. Assuming a linear relationship, use the least-squares method to determine the regressions coefficients b 0 and b 1 . c. Interpret the meaning of the slope, b 1 , in this problem. d. Predict the mean weekend box office gross for a movie that had 20 million You Tube trailer views. e. What conclusions can you reach about predicting weekend box office gross from You Tube trailer views?
Solution Summary: The author explains how to construct a scatter plot for YouTube trailer views and opening weekend gross using EXCEL software.
A box office analyst seeks to predict opening weekend box office gross for movies. Toward this goal, the analyst plans to use YouTube trailer views as a predictor. For each of 66 movies, the you Tube trailer view count, the number of You Tube trailer viewer from the release of the trailer through the Saturday before a movie opens, and the opening weekend box office gross
(in
$millions)
are collected and stored in Movie.
For these data,
a. Construct a scatter plot.
b. Assuming a linear relationship, use the least-squares method to determine the regressions coefficients
b
0
and
b
1
.
c. Interpret the meaning of the slope,
b
1
, in this problem.
d. Predict the mean weekend box office gross for a movie that had 20 million You Tube trailer views.
e. What conclusions can you reach about predicting weekend box office gross from You Tube trailer views?
Definition Definition Representation of the direction and degree of correlation in graphical form. The grouping of points that are plotted makes it a scatter diagram. A line can be drawn showing the relationship based on the direction of points and their distance from each other.
During busy political seasons, many opinion polls are conducted. In apresidential race, how do you think the participants in polls are generally selected?Discuss any issues regarding simple random, stratified, systematic, cluster, andconvenience sampling in these polls. What about other types of polls, besides political?
Please could you explain why 0.5 was added to each upper limpit of the intervals.Thanks
28. (a) Under what conditions do we say that two random variables X and Y are
independent?
(b) Demonstrate that if X and Y are independent, then it follows that E(XY) =
E(X)E(Y);
(e) Show by a counter example that the converse of (ii) is not necessarily true.
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