In order to determine the average commute of college students, a researcher gathers data from a group of 50 students at the local college. This sample yieldied a mean of 14 and a standard deviation of 1.9. Required:
Construct a 90% confidence interval for the population mean from the provided data.

13.5579875<x<14.44201244

Step-by-step explanation:

The formula for calculating the confidence interval is expressed as:

CI = x+/- z × s/\sqrt{n}

x us the mean = 14

Z is the 90% CI = 1.645

S is the standard deviation = 1.9

n is the sample size = 50

Substitute.

CI = 14+/-1.645×1.9/7.07106.

CI = 14+/-1.645×0.26870057

CI = (14-0.44201244, 14+0.44201244)

CI = 13.5579875, 14.44201244

Hence the required interval is 13.5579875<x<14.44201244

cut 138 centimeters off

step-by-step explanation:

250-112 = 138

check above link.

graphically?   well, you graph them both, the solutions is where they both intersect each other, since there are two solutions, meaning they will meet twice, or namely the linear will run into the quadratic curve twice, and where they meet, those x,y coordinates are the solutions to the system.