A videotape store has an average weekly gross of 1,158 with a ...

[lidoalex]

A videotape store has an average weekly gross of 1,158 with a standard deviation of 120 . Let x be the store's gross during a randomly selected week. If this is a normally distributed random variable, then the number of standard deviations from 1,158 to 1,360 is:
 a. 0.4535.
  b. 0.0465.
  c. 20.98.
  d. 1.683.
  e. none of these.

Question 2

Which of the following is not a characteristic for a normal distribution?
 a. It is symmetrical distribution
  b. The mean is always zero
  c. The mean, median, and mode are all equal
  d. It is a bell-shaped distribution
  e. The area under the curve always equals 1.0

[polinasid]

Answer to Question 1

D

Answer to Question 2

B

[lidoalex]

Gracias!

[nguyenhoanhat]

TYSM