What is the probability that x is at most 2? What will be an ...

[Marty]

What is the probability that x is at most 2?
 
  What will be an ideal response?

Question 2

What is the mean and standard error of the sample proportion of invoices with amounts in excess of 800?
 
  A) mean = 10, standard error = 0.4472
  B) mean = 0.20, standard error = 0.0566
  C) mean = 0.20, standard error = 0.0032
  D) mean = 10, standard error = 0.0598

[stano32]

Answer to Question 1

0.9817

Answer to Question 2

B