A simple random sample of 144 observations was taken from a large ...

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A simple random sample of 144 observations was taken from a large population. The sample mean and the standard deviation were determined to be 1234 and 120 respectively. The standard error of the mean is
 a. 1234120.
   b. 120.
   c. 1440.
   d. 10.

Question 2

In a multiple regression model, the error term  is assumed to be a random variable with a mean of
 a. zero.
  b. -1.
  c. 1.
  d. any value.

[zogaridan]

Answer to Question 1

d

Answer to Question 2

a