Given that Young's modulus is a quantitative measure of stiffness of an
elastic material. Suppose that for aluminum alloy sheets of a
particular type, its mean value and standard deviation are 70 GPa
and 1.6 GPa, respectively.
Part A:
If X is the sample mean Young's modulus for a
random sample of n = 16 sheets, the sampling distribution of X
centered at 70 GPa, and the standard deviation of the X
distribution is given by

Part B:
If X is the sample mean Young's modulus for a
random sample of n = 64 sheets, the sampling distribution of X
centered at 70 GPa, and the standard deviation of the X
distribution is given by
Answer:
the decrease in price increase the demand.
Explanation:
Steve is a consumer of goods, his demand will increase if the price drops. In this case, the hamburgers price decrease so it demand increases too.
This makes his consumer surplus increase as well, as he was willing to pay up to $2 per hamburger, receiving 2 at 1 dollar genrate an additional consumer surplus for $2 dollars
Answer:
a) The return on stockholders’ equity = 15%
b) The return on common stockholders’ equity = 16%
Explanation:
a) Return on Stockholders’ Equity = (Net income)/(Average stockholders' equity)
= ($375,000)/$2,500,000
= 15%
b) Return on Common Stockholders’ Equity = (Net income - Preferred dividends) /(Average return on common stockholders' equity)
= ($375,000 - $75,000) / $1,875,000
= 16%