## [answered] A random sample of the price of gasoline from 40 gas statio

A random sample of the price of gasoline from 40?gas stations in a region gives the statistics below. Complete parts a) and b).?

ybar =?\$3.29,?s =?\$0.25

a) Find a 95%?confidence interval for the mean price of regular gasoline in that region.__, __?(Round to three decimal places as needed.)

b) If we had the same statistics from a sample of 80?stations, what would the 95% confidence interval be now? __, __??(Round to three decimal places as needed.)

a)

Note that Margin of Error E = z(alpha/2) * s / sqrt(n) Lower Bound = X ? z(alpha/2) * s / sqrt(n) Upper Bound = X + z(alpha/2) * s / sqrt(n) where alpha/2 = (1 ? confidence level)/2 = 0.025 X...

Solution details:
STATUS
QUALITY
Approved

This question was answered on: Sep 18, 2020 Solution~0001003511.zip (25.37 KB)

This attachment is locked

We have a ready expert answer for this paper which you can use for in-depth understanding, research editing or paraphrasing. You can buy it or order for a fresh, original and plagiarism-free copy from our tutoring website www.aceyourhomework.com (Deadline assured. Flexible pricing. TurnItIn Report provided)

##### Pay using PayPal (No PayPal account Required) or your credit card . All your purchases are securely protected by .

STATUS

QUALITY

Approved

Sep 18, 2020

EXPERT

Tutor 