In a sample of 200 men, 130 said they wore seatbelts. in a sample of 300 women, 140 said they wore seatbelts. find a 95% confidence interval for the difference in proportion of men and women who wear seatbelts. g

(0.093,0.267)

Step-by-step explanation:

The confidence interval for the difference in proportion is given by :-

Given : ;  

Proportion of men said they wore seatbelts =

Proportion of women said they wore seatbelts =

Significance level :

Critical value :

Now, the 95% confidence interval for the difference in proportion of men and women who wear seatbelts will be :-

Hence, the 95% confidence interval for the difference in proportion of men and women who wear seatbelts = (0.093,0.267)

the dimensions are:

step-by-step explanation:

we want to find the dimensions of a rectangular box with volume of

we factor to obtain;

we rewrite the rightmost factor to obtain;

recall that:

we apply difference of two squares formula to obtain;

hence the dimensions are

answer: expected value of x = 1.0

step-by-step explanation:

p(x=0) = 0.25

p(x=1) = 0.50

p(x=2) = 0.25

expected value for x = 0×0.25 + 1×0.5 + 2×0.25 = 1.0