Two different formulas of an oxygenated motor fuel are being tested to study their road octane numbers. the variance of road octane number for formula 1 is o 1.5, and for formula 2 it is 05= 1.2. two random samples of size n1 = 15 and2= 20 are tested, and the mean octane numbers observed are x1 = 88.9 fluid ounces and x2=92.5 fluid ounces. assume normality. what sample size would be required in each population if you wanted to be 95% confident that the error in estimating the difference in mean road octane number is less than 1?

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b. x + 1

step-by-step explanation:

i'am smart

41*67/2=1373.5

step-by-step explanation:

i just used a calculator

step-by-step explanation:

let

we know that

the y-intercept is the y-coordinate of the point when the value of x is equal to zero

so

the y-coordinate of the point a is the y-intercept

the answer part a) is

the value of y-intercept is

part b) find the slope m

we know that

the value of the slope is equal to

substitute the values

therefore

the answer part b) is

the value of the slope is equal to

the general answer is

the slope is

the value of y-intercept is