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(Solved) Sales and Advertising Data Sales 202.66 232.91 272.07 290.97 299.09 296.95 279.49 255.75 242.78 255.34 271.58 268.27 260.51 266.34 281.24 286.19...


Run the regression model for the following two attached Excel problems. discuss the each of those areas and outputs. Since excel does most of the work here, provide opinions and comments. 


a Find the least squares point estimates b0 and b1of b0 and b1 on the output and report their values.

b Find SSE and s on the computer output and report their values.

c Find s b1 and the t statistic for testing the significance of the slope on the output and report their values.Show (within rounding) how t has been calculated by using b1and sb1from the computer output.

d. Using the t statistic and an appropriate critical value, test H0: b1=0 versus Ha: b1 â 0 by setting a equal to .05. Is the slope (regression relationship) significant at the .05 level?

e. Using the t statistic and an appropriate critical value, test H0: b1=0 versus Ha: b1â 0 by setting a

equal to .01. Is the slope (regression relationship) significant at the .01 level?

f. Find the p-value for testing H0: b1=0 versus Ha: b1â  0 on the output and report its value. Using the p-value, determine whether we can reject H0 by setting a equal to .10, .05, .01, and .001. How much evidence is there that the slope (regression relationship) is significant?

g. Calculate the 95 percent confidence interval for b1using numbers on the output. Interpret the interval.

h. Calculate the 99 percent confidence interval for b1using numbers on the output.

i. Find s bo and the t statistic for testing the significance of the y intercept on the output and report their values. Show (within rounding) how t has been calculated by using b0 and s b0 from the computer output.

j. Find the p-value for testing H0: b0=0 versus Ha: b0â  0 on the computer output and report its value.

Using the p-value, determine whether we can reject H0 by setting a equal to .10, .05, .01, and .001.

What do you conclude about the significance of the y intercept?

Sales and Advertising Data
Sales
202.66
232.91
272.07
290.97
299.09
296.95
279.49
255.75
242.78
255.34
271.58
268.27
260.51
266.34
281.24
286.19
271.97
265.01
274.44
291.81
290.91
264.95
228.40
209.33 AdvExp
116.44
119.58
125.74
124.55
122.35
120.44
123.24
127.55
121.19
118.00
121.81
126.54
129.85
122.65
121.64
127.24
132.35
130.86
122.90
117.15
109.47
114.34
123.72
130.33

 


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