The average gasoline price of one of the major oil companies has been hovering around $2.20 per gallon. because of cost reduction measures, it is announced that there will be a significant reduction in the average price over the next month. in order to test this belief, we wait one month, then randomly select a sample of 36 of the company's gas stations. we find that the average price for the stations in the sample was $2.15. the standard deviation of the prices for the selected gas stations is $.10. given that the test statistic for this sample is t = –3, determine the p-value.

0.0025

Step-by-step explanation:

Let be the population mean for the gasoline price of one of the major oil companies .

As per given , we hav

Since the alternative hypothesis is left-tailed , so the test is a left-tailed test.

Given : n= 36

Degree of freedom : 35    (df= n-1)

The given test statistic : t=-3

Using the p-value table or p-value calculator for a student's t -value left-test having degree of freedom 35, we have

P-value :

Thus , the required p-value = 0.0025

answer: procent 54 wynosi 33,33%

answer: the answer is (b) amie should have multiplied

step-by-step explanation: given a sphere and a cylinder with same radius and height.

let, 'r' be the radius of the cylinder and sphere and 'h' be the height of the cylinder. according to the question,

r = h.

now, the volume of the sphere will be

and the volume of the cylinder will be

therefore, we have

thus, ammie should have multiplied the volume of the sphere