If x is a normal random variable with a mean of 100 and a ...

[bobbie]

If x is a normal random variable with a mean of 100 and a standard deviation of 10, find the following probabilities: A) P(x 128) B) P(x 113) C) P(87 x 98)

Question 2

Thirty-six months were randomly sampled and the discount rate on new issues of 91-day Treasury Bills was collected. The sample mean is 4.76 and the standard deviation is 171.21 . What is the unbiased estimate for the mean of the population?
 a. 29312.86
  b. 13.0847
  c. 0.0476
  d. 4.76
  e. 8.1496

[ultraflyy23]

Answer to Question 1

0.0026; 0.9032; 0.3239

Answer to Question 2

D