Question

In Whoville 65% of whoes drive Hovers. Suppose another random sample of 25 whoes is obtained. What is the probability that more than 70% of the whoes from this sample drive Hovers?

Answer 1

Solution

Given that,

p = 0.65

1 - p = 1-0.65=0.35

n = 25

= p =0.65

=  [p( 1 - p ) / n] = [(0.65*0.35) / 25 ] = 0.095

P( >0.70 ) = 1 - P( < 0.70)

= 1 - P(( - ) / < (0.70-0.65) / 0.095)

= 1 - P(z <0.53 )

Using z table

= 1 -0.7019

probability=0.2981