please help me solve within 30 min
Solution:
Given that,
n = 100
= 44% =0.44
1 -
= 1 - 0.44 = 0.56
=
= 0.44
=
( 1 -
) / n
=
0.44*
0.56 / 100
= 0.0496
= 0.0496
P( 0.40 <
< 0.45 )
P( 0.40 - 0.44 / 0.0496 ) < (
-
/
) < ( 0.45 - 0.44 / 0.0496 )
P ( - 0.04 /0.0496 < z < -0.01 / 0.0496 )
P ( - 0.81 < z < -0.20 )
P ( z < -0.20 ) - p ( z < - 0.81 )
Using z table
= 0.4207 - 0.2090
= 0.2117
Probability = 0.2117
Option 0.2117 is correct.
please help me solve within 30 min Question 5 On October 26, 2009, President Obama had...
On April 3, 2012, President Obama had an approval rating of 47% (according to a Gallup Poll). Suppose a sample of 100 Americans is taken that same week. What is the probability that the sample proportion has between a 42% and a 50% approval rating?