Question

A particular type of Gasoline is suppose to have a mean octane rating greater than 90%. Five measureaments are taken of the octane rating, as follow:

90.1 88.8 89.5 91.0 92.1

Can you conclude that the mean octane rating is great er than 90%?

Answer 1

Yes

Explanation:

The mean is just the average, and it's calculated by adding up all the data set numbers and dividing that sum by the number of numbers:

(90.1 + 88.8 + 89.5 + 91.0 + 92.1) / 5 = 451.5 / 5 = 90.3

Our average/mean is 90.3%, which is clearly greater than 90%. So, yes, we can conclude that the mean octane rating is greater than 90%.

Hope this helps!

Answer 2

Yes

Explanation:

The mean octane rating will be 90.3

Hope this helps!