lowkstahyna

12.05.2021 • 

Mathematics

A random sample of 30 professional tennis players is selected. For each tennis player, their first serve percentage and their second serve percentage are recorded. A 95% confidence interval for the mean difference (first - second) in
serve percentages is found to be 0.10 to 0.18. A tennis coach claims that there is no difference in first and second
serve percentages among professional tennis players. Is this claim supported by the confidence interval?
O No, the confidence interval does not contain the value of 0.
Yes, the confidence interval does not contain the value of 0.
O No, the confidence interval does not contain negative numbers.
O Yes, the confidence interval consists entirely of positive numbers.

Ответ:

jbearden

08.05.2022

Mathematics

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The perimeter of crater lake is 17.27 miles.

Step-by-step explanation:

Given as :

The shape of the lake is like a circle

The diameter of lake = d = 5.5 miles

∵ shape pf lake is circle, so the diameter of circle = d = 5.5 miles

Let The perimeter of crater lake = p miles

Now, As we know

The perimeter of circle = × diameter

the value of   = 3.14

Or, p =   × d

Or, p =   × 5.5 miles

Or, p =  3.14 × 5.5 miles

∴ p = 17.27 miles

So, The perimeter of circle = perimeter of lake = p = 17.27 miles

Hence, The perimeter of crater lake is 17.27 miles. Answer

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