Question

In: Statistics and Probability

A company that holds the DVD distribution rights to movies previously released only in theaters has...

A company that holds the DVD distribution rights to movies previously released only in theaters has the business objective of developing estimates of the sales revenue of DVDs. Toward this goal, a company analyst plans to use box office gross to predict DVD sales revenue. For 43 movies, the analyst collects the box office gross (in $millions) in the year that they were released and the DVD revenue (in $millions) in the following year and stores these data here.

What are the values for

(1) the proportion of variation in DVD sales revenue that is explained by box office gross ,

(2) the sum of squares Y ,

(3) the sum of squares predicted ,

(4) the sum of squares error ,

(5) the intercept A ,

(6) the slope b ,

(7) the predicted sales revenue (in $millions) for a movie DVD that had a box office gross of $100 million

(8) the standard error of estimate ? Hint: Use PHStat to obtain all the values and answers should be accurate to 4 decimal places.

Title Gross DVD Revenue
Harry Potter & the Deathly Hollows: Part 1I 381.01 94.43
Transformers: Dark of the Moon 352.39 44.78
The Hangover Part II 254.46 35.39
Pirates of the Caribbean:On Stranger Tides 241.06 17.86
Fast Five 210.03 30.63
Cars 2 191.45 73.12
Thor 181.03 19.85
Rise of the Planet of the Apes 176.76 27.03
Capatin America: The First Avenger 176.65 21.49
Bridesmaids 169.21 52.75
The Help 169.50 54.59
Kung Fu Panda 2 165.25 24.94
X-Men First Class 146.41 23.19
Puss in Boots 145.74 44.98
The Smurfs 142.61 28.96
Mission Impossible:Ghost Protocol 141.19 22.58
Sherlock Holmes: A Game of Shadows 136.91 44.70
Super Eight 127.00 14.57
Rango 123.48 22.63
Horrible Bosses 117.54 16.76
Green Lantern 116.60 16.89
The Lion King 109.95 20.49
Cowboys and Aliens 100.37 17.39
Real Steel 84.49 24.91
Crazy Stupid Love 84.39 15.39
The Muppets 83.56 27.99
Battle:Los Angeles 83.55 13.28
Immortals 82.70 18.60
Zookeeper 80.36 11.93
Limitless 79.25 11.19
Tower Heist 76.80 14.10
Moneyball 75.02 19.23
Justin Bieber: Never Say Never 73.01 23.67
DolphinTale 72.02 13.63
Jack and Jill 71.75 11.67
Mr. Popper's Penguins 68.22 16.30
Happy Feet 2 60.97 19.54
Water for Elephants 58.71 13.21
The Lincoln Lawyer 58.01 10.65
Hugo 50.31 17.42
New Year's Eve 47.26 8.68
Arthur Christmas 46.07 12.28
War Horse 44.09 24.94

Solutions

Expert Solution

(1) the proportion of variation in DVD sales revenue that is explained by box office gross ,

0.5123

(2) the sum of squares Y ,

12,570.0250

(3) the sum of squares predicted ,

6,439.6133

(4) the sum of squares error ,

6,130.4117

(5) the intercept A ,

4.8445

(6) the slope b ,

0.1631

(7) the predicted sales revenue (in $millions) for a movie DVD that had a box office gross of $100 million

21.1588

(8) the standard error of estimate ? Hint: Use PHStat to obtain all the values and answers should be accurate to 4 decimal places.

12.2279

The regression output is:

0.5123
r   0.716
Std. Error   12.2279
n   43
k   1
Dep. Var. DVD Revenue
ANOVA table
Source SS   df   MS F p-value
Regression 6,439.6133 1   6,439.6133 43.07 6.86E-08
Residual 6,130.4117 41   149.5222
Total 12,570.0250 42  
Regression output confidence interval
variables coefficients std. error    t (df=41) p-value 95% lower 95% upper
Intercept 4.8445
Gross 0.1631 0.0249 6.563 6.86E-08 0.1129 0.2133
Predicted values for: DVD Revenue
95% Confidence Interval 95% Prediction Interval
Gross Predicted lower upper lower upper Leverage
100 21.1588 17.15791 25.15977 -3.85797 46.17565 0.026

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