Complete the mcq:
The number of correct answers on a 10 questions test has Binomial Distribution with parameters n= 10 p= 0.40:
Q1- Find P( X > 7):
A) 0.43 B) 0.013 C) 0.23 D) 0.68
Q2- Find the expected number (mean) of correct answers by student.
A) 10 B) 5 C) 6 D) 4
Q3- Find the standard deviation of the number of correct answers by student.
A) 2.61 B) 1.55 C) 1.19 D) 2.91
Q4- For a standard normal distribution Z, find the value of 'b' such as P ( 0 < Z < b) = 0.3907
A) 1.94 B) 1.23 C) 2.05 D) 3.41