Question

Please, if someone could please help me with this problem...
If np ≥ 5 and nq ≥ 5, estimate P (more than 4) with n = 11 and p = 0.7 by using the normal distribution as an approximation to the binomial distribution; if np < 5 or nq < 5, then state that the normal approximation is not suitable.
a. P(more than 4) =
b. The normal distribution cannot be used.

Answer 1

well, what is np and nq?

Answer 2

np= 11*0.7 nq=11*4

Answer 3

@amistre64

Answer 4

p= .7

q = 1-p = .3

11(.7) and 11(.3)

Answer 5

7.7 and 3.3

Answer 6

@amistre64

Answer 7

is 3.3 >= 5 ?