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Author Question: Residual analysis is conducted to check whether regression assumptions are met. Which of the ... (Read 74 times)

fox

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on: Jun 24, 2018
Residual analysis is conducted to check whether regression assumptions are met. Which of the following is not an assumption made in simple linear regression?
 
  A) Errors are independent of each other.
  B) Errors are normally distributed.
  C) Errors are linearly related to x.
  D) Errors have constant variance.

Question 2

A company has recorded annual sales for the past 14 years and found the following linear trend model: y = 5.23 + 144.60t. This means that:
 
  A) on average sales are increasing by of 5.23 per year.
  B) on average sales are increasing by of 144.6 per year.
  C) there is a seasonal component in the data.
  D) sales in year 1 were 5.23.


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zhanghao

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Reply #1 on: Jun 24, 2018
Answer to Question 1

C

Answer to Question 2

B


fox

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Reply 2 on: Jun 24, 2018
Gracias!

yeungji

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Reply 3 on: Yesterday
Wow, this really help

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