Question

In: Statistics and Probability

. The amount spent in billions for online ads per year is shown below. Construct a...

. The amount spent in billions for online ads per year is shown below. Construct a time series plot of the data and describe the trend. please help with graphing and explaining

year 2010 2011 2012 2013 2014 2015
amount $68.4 $80.2 $94.2 $106.1 $119.8 $132.1

Solutions

Expert Solution

Year Amount t
2010 68.4 1
2011 80.2 2
2012 94.2 3
2013 106.1 4
2014 119.8 5
2015 132.1 6
Mean 100.1333 3.5
N 6 6
Sum 600.8 21

The trend is positive.

Y'=a+bX

Wher X= t (time series)

SUMMARY OUTPUT
Regression Statistics
Multiple R 0.999789706
R Square 0.999579456
Adjusted R Square 0.99947432
Standard Error 0.550627348
Observations 6
ANOVA
df SS MS F Significance F
Regression 1 2882.580571 2882.580571 9507.49 6.63E-08
Residual 4 1.212761905 0.303190476
Total 5 2883.793333
Coefficients Standard Error t Stat P-value Lower 95%
Intercept 55.21333333 0.512606164 107.7110211 4.46E-08 53.79011
t 12.83428571 0.131625112 97.50636132 6.63E-08 12.46884

orchestra answered 3 years ago
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