You read about a survey in a newspaper and find that 70% of the 250 people sampled prefer candidate a. you are surprised by this survey because you thought that more like 50% of the population preferred this candidate. based on this sample, is 50% a possible population proportion?

50% is not a possible population proportion who support candidate A.

Step-by-step explanation:

I will estimate 95% confidence interval to see if 50% a possible population proportion who support candidate A.

95% Confidence Interval can be calculated using  

CI=p± where

Then CI=0.70±≈ 0.70±0.06

That is 95% confidence interval is (64%, 76%). Since 50% is less than lower CI limit, 50% is not a possible population proportion who support candidate A.

depends on how many days you are talking about

step-by-step explanation:

the simplified form is

step-by-step explanation:

we want to simplify the expression,

let us change the middle bar to a normal division sign to obtain,

we multiply the first fraction by the reciprocal of the second fraction to obtain,

we factor to obtain,

we cancel the common factors to get,

we simplify to get,

the correct answer is b