Suppose a simple random sample of size n is drawn from a large population with mean mu and standard deviation sigma. the sampling distribution of x overbar has mean mu subscript x overbarequals and standard deviation sigma subscript x overbarequals

The sampling distribution of x overbar has mean μ Subscript x overbars = "μ",  nd standard deviation sigma Subscript x overbar = "σ overbar square root of n"

Explanation:

The symbol for Standard Deviation is σ (the Greek letter sigma).

"To calculate the standard deviation of those numbers:

   1. Work out the Mean (the simple average of the numbers)

   2. Then for each number: subtract the Mean and square the result

   3. Then work out the mean of those squared differences.

   4. Take the square root"

Reference: MathisFun.com. “Standard Deviation Formulas.” Standard Deviation Formulas, 2017

according to hess's theory, when the magma cooled, it would expand and push the tectonic plates apart. it would push the north and south america plates to the west and eurasia and africa ones to the east. the atlantic ocean would get wider but the coastlines of the masses would stay the same.

harry hammond hess was a geologist and a united states navy officer in the second world war. he is considered to be one of the founding fathers of the theory of plate tectonics. he is known for his theories on sea floor spreading, stating that the movement of the continents was the result of see floor spreading. the continents are attached to the plates and do not move separately. the plates themselves shift and change shape, carrying the continents along.

using the scientific method.