The weight of a product is measured in pounds. a sample of 50 units is taken from a recent production. the sample yielded x¯¯¯ = 75 lb, and we know that σ2 = 100 lb. calculate a 99 percent confidence interval for μ.

(71.36, 78.64)

Step-by-step explanation:

Given : Sample size : n= 50

Sample mean :

Variance :

Standard deviation :

Significance level :

Critical value :

The confidence interval for population mean is given by :-

Hence, the 99% confidence interval for population mean = (71.36, 78.64)

what's that

step-by-step explanation:

i think something is missing in your question because y-1=(x-12) would not pass through the point (-4,-3). because if you replace x by -4 your are supposed to find y=-3 which is not the case her. if you replace x by -4 you find =-15.

i assume the right equation is y-1=1/4*(x-12) because this one is passing through both your points (if you are interested to know how i found that out i can tell you).

in this equation if i replace x by -4 i find y=-3 and if i replace x by 12, i find y=1 so the line representing this equation is passing through those 2 points.

then the standard form of the equation is finding an expression of y in function of x

y-1=1/4*(x-12)

y=x/4-3+1

y=x/4-2

hope that .

do you confirm there was a mistake in the question?