The 2004 presidential election exit polls from the critical state of ohio provided the following results. the exit polls had 2020 respondents, 768 of whom were college graduates. of the college graduates, 412 voted for george bush.

a. calculate a 95% confidence interval for the proportion of college graduates in ohio who voted for george bush.
b. calculate a 95% lower confidence bound for the proportion of college graduates in ohio who voted for george bush.

Step-by-step explanation:

The 2004 presidential election polls from critical state of Ohio reveals that out of 768 college graduates, 412 voted for Geoge Bush.

p = proportion of college graduates who voted for George Bush =

q =

Margin of error = 95% z value * std error

=

Confidence interval =

b) Lower confidence bound = 0.5082

option 1 is correct.

step-by-step explanation:

y varies inversely with x and constant of variation is 4

the equation will be:

y = k/x

where k =4 so,

y = 4/x

if we put values of x of option 1 in the above equation and find values of y

y = 4/-2 => y =-2

y = 4/-1 => y = -4

y = 4/1 => y = 4

y = 4/2 => y =2

so, all the values of x and y are correct.

if we put values of x given in other options and find value of y we cannot find whole table satisfying the equation.

hence option 1 is correct.