iamabouttofail
23.11.2019 •
Mathematics
Consider the following time series data of sales per year: year sales 1995 22.2 1996 23.0 1997 24.4 1998 25.8 1999 27.6 enter these data in excel and run the following regression: sales = intercept + slope * year note that the year is the independent variable and sales is the dependent variable. a 95% confidence interval for the slope is:
a. (-3233.88, -2068.92)
b. (1.04, 1.68)
c. (0.80, 1.88)
d. (0.92,1.76)
e. (-3482.53,-1820.27)
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Ответ:
b. (1.04, 1.68)
Step-by-step explanation:
Hello!
With the given data I've estimated the regression line
Y: Sales
X: Year
Yi= -2691.32 + 1.36Xi
Where
a= -2691.32
b= 1.36
The 95% CI calculated using the statistic b±
*(Sb/√n) is [1.04;1.68]
I hope it helps.
Ответ:
k
Step-by-step explanation:
l