In math class of seven woman and nine men, if one person is selected at random to come the board to show the solution to a probl
1 answer:
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Answer: (-0.086, 0.026)
Step-by-step explanation:
The confidence interval for the difference of two population proportion is given by :-
Given : Significance level :
Critical value :
Sample size :
The 90% confidence interval for the difference in the population proportions will be :-
let y be the horizontal distance and x the vertical
y/400 = cos 20
y=400 cos20
y=376m
x/400 =sin20
x=400sin20
x=137m
