Suppose X is a binomial random variable with n = 800 and p = ...

[Mimi]

Suppose X is a binomial random variable with n = 800 and p = 0.20. Find the approximate the probability P(X  180) with the normal approximation with a continuity correction.

Question 2

A random sample of 30 students spent an average amount of 40.00 on a date, with a standard deviation of 5.00 . The standard error of the sample mean is 0.913 . Calculate an approximate 95 confidence interval for the average amount spent by all students on a date.
 a. (40.00, 90.00)
  b. (79.10, 80.90)
  c. (78.20, 81.80)
  d. None of the above

[jackie]

Answer to Question 1

0.0427

Answer to Question 2

C

[Mimi]

TYSM

[lindahyatt42]

Excellent