10 random samples of 20 people each are used to determine the proportion of people who support the local soccer team over other soccer teams in the league. The proportions for the samples are 0.85 0.70 0.75 0.80 0.65 0.80 0.60 0.75 0.85 0.75 What does the proportion 0.85 mean for the first sample? The mean of the sample proportions is 0.75 and the standard deviation is 0.08. What margin of error should be used for the estimate of the population proportion?

a is the right answer

more detail

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

b. 1.25 hr

step-by-step explanation:

if you have a constant speed of 60 mph, then you have a ratio between 60 mi. to 1 hr. dividing both sides by 60 we get the ratio

1 mi. to

then mult. both sides by 75 we get the ratio

75 mi. to

simplifying we get

75 mi. to

or 1.25 hr.