Is there enough evidence to support the claim that on average, car sales are higher in the 4th quarter than in the 2nd quarter at the 0.01 level of significance? If yes, write the regression equation in the spaces provided, rounded to two decimal places. Else, select "There is not enough evidence."
Is there enough evidence to support the claim that on average, car sales are higher in the 4th quarter than in the 2nd quarter at the 0.01 level of significance? If yes, write the regression equation in the spaces provided, rounded to two decimal places. Else, select "There is not enough evidence."
Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter1: Functions
Section1.EA: Extended Application Using Extrapolation To Predict Life Expectancy
Problem 2EA
Related questions
Question
Suppose the following data were collected from a sample of 5 car manufacturers relating monthly car sales to the number of dealerships and the quarter of the year. Use statistical software to find the following regression equation:
SALESi= b0 + b1DEALERSHIPSi + b2 QUARTER1i+ b3QUARTER2i + b4QUARTER3i+ ei
Is there enough evidence to support the claim that on average, car sales are higher in the 4th quarter than in the 2nd quarter at the 0.01 level of significance? If yes, write the regression equation in the spaces provided, rounded to two decimal places. Else, select "There is not enough evidence."
Monthly Sales | Number of Dealerships | 1st Quarter (1 if Jan.-Mar., 0 otherwise) | 2nd Quarter (1 if Apr.-Jun., 0 otherwise) | 3rd Quarter (1 if Jul.-Sep., 0 otherwise) | 4th Quarter (1 if Oct.-Dec., 0 otherwise) |
---|---|---|---|---|---|
85482 | 4 | 1 | 0 | 0 | 0 |
101319 | 9 | 1 | 0 | 0 | 0 |
121389 | 12 | 1 | 0 | 0 | 0 |
133677 | 18 | 1 | 0 | 0 | 0 |
194588 | 22 | 1 | 0 | 0 | 0 |
82128 | 4 | 0 | 1 | 0 | 0 |
150407 | 9 | 0 | 1 | 0 | 0 |
242714 | 12 | 0 | 1 | 0 | 0 |
260324 | 18 | 0 | 1 | 0 | 0 |
273495 | 22 | 0 | 1 | 0 | 0 |
65497 | 4 | 0 | 0 | 1 | 0 |
101489 | 9 | 0 | 0 | 1 | 0 |
150188 | 12 | 0 | 0 | 1 | 0 |
165463 | 18 | 0 | 0 | 1 | 0 |
200443 | 22 | 0 | 0 | 1 | 0 |
98531 | 4 | 0 | 0 | 0 | 1 |
200346 | 9 | 0 | 0 | 0 | 1 |
250162 | 12 | 0 | 0 | 0 | 1 |
306556 | 18 | 0 | 0 | 0 | 1 |
389591 | 22 | 0 | 0 | 0 | 1 |
Selecting a checkbox will replace the entered answer value(s) with the checkbox value. If the checkbox is not selected, the entered answer is used.
SALESi= _________ + __________ DEALERSHIPi+________QUARTER 1i, +______QUARTER2i +______ QUARTER3i +ei
or chec the box if there is not enough evidence.
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