Question

A binomial event has n = 50 trials. The probability of success for each trial is 0.60. Let x be the number of successes of the event during the 50 trials. What are μx and σx?
30 and 3.4641
30 and 5.4772
20 and 3.4641
20 and 5.4772
50 and 3.4641

Answer 1

Answer:

30 and 3.4641

Step-by-step explanation:

The mean of a binomial distribution is:

μ = np

And the standard deviation of a binomial distribution is:

σ = √(npq)

Here, n = 50, p = 0.60, and q = 0.40.

μ = np = 50 × 0.60 = 30

σ = √(npq) = √(50 × 0.60 × 0.40) = 3.4641

Answer 2

Answer:

A. 30 and 3.4641

Step-by-step explanation: