Ahigh school teacher discovers that her class this year did exceptionally better on an exam than classes in previous years had. she wishes to test the theory that this class is a higher performing cohort on average than previous cohorts. in particular her sample size is 50 students and her average this year on her first exam was an 85 percent. the long term average has been 60 percent.

a) propose a null and an alternate hypothesis for which she can test her assertion? (for ease with the next few parts you may assume at this point that the long term average is robust enough that she can treat it as a parameter)

b) what is the p-value of the test results this year under the null distribution that you proposed? (you will want to convert the sample mean into something you know the distribution of. then you will want to assume the null is true, to form a test statistic for your test, which you can evaluate against your known distribution)

c) define a rejection region of the null hypothesis for the average assuming a signicance level of .05 .

d) calculate the power of the test (you may assume that this year's average is the true value under the alternative to you calculate the probability of rejection).

The cost of capital: introduction the cost of capital: introduction companies issue bonds, preferred stock, and common equity to aise capital to invest in capital budgeting projects. capital is』necessary factor of production and like any other factor, it has a cost. this cost is equal to the select the applicable security. the rates of return that investors require on bonds, preferred stocks, and common equity represent the costs of those securities to the firm. companies estimate the required returns on their securities, calculate a weighted average of the costs of their different types of capital, and use this average cost for capital budgeting purposes. required return on rate: when calculating om operations when the firm's primary financial objective is to select shareholder value. to do this, companies invest in projects that earnselect their cost of capital. so, the cost of capital is often referred to as the -select -select and accruals, which a se spontaneously we hted average cost of capital wa c our concern is with capital that must be provided by select- 쑤 interest-bearing debt preferred stock and common equity. capital budgeting projects are undertaken, are not included as part of total invested capital because they do not come directly from investors. which of the following would be included in the caculation of total invested capital? choose the response that is most correct a. notes payable b. taxes payable c retained earnings d. responses a and c would be included in the calculation of total invested capital. e. none of the above would be included in the cakulation of total invested capital.

Match the given situations to the type of risks that a business may face while taking credit.(there's not just one answer)1. beta ltd. had taken a loan from a bankfor a period of 15 years, but its salesare gradually showing a decline.2. alpha ltd. has taken a loan for increasing its production and sales,but it has not conducted any researchbefore making this decision.3. delphi ltd. has an overseas client. the economy of the client’s country is going through severe recession.4. delphi ltd. has taken a short-term loanfrom the bank, but its supply chain logistics are not in place.a. foreign exchange riskb. operational riskc. term of loan riskd. revenue projections risk

According to this excerpt, a key part of our national security strategy is