The expected value for a binomial probability distribution is ...

[MGLQZ]

The expected value for a binomial probability distribution is _____.
 a. E(x) = pn(1  n)
  b. E(x) = p(1  p)
  c. E(x) = np
  d. E(x) = np(1  p)

Question 2

Consider the following hypotheses test. H0:   80 Ha:  < 80 A sample of 121 provided a sample mean of 77.3 . The population standard deviation is known to be 16.5.
 a. Compute the value of the test statistic.
  b. Determine the p-value; and using  = .063, test the above hypotheses.
  c. Using the critical value approach and  = .063, test the hypotheses.

[Sammyo]

Answer to Question 1

c

Answer to Question 2

a. z = -1.8
b. p-value = .0359 < .063, reject H0
c. test statistic z = -1.8 < z.063 = -1.53, reject H0

[MGLQZ]

Correct answers!

[Sammyo]

Great! Please up vote