A study of undergraduate computer science students examined changes in major after the first year. The study examined the fates of 256 students who enrolled as first-year students in the same fall semester. The students were classified according to gender and their declared major at the beginning of the second year. For convenience we use the labels CS for computer science majors, EO for engineering and other science majors, and O for other majors. The explanatory variables included several high school grade summaries coded as 10 = A, 9 = A-, etc. Here are the mean high school mathematics grades for these students.

Describe the main effects and interaction using appropriate graphs and calculations.

Buffers are solutions that resist changes in pH. find a "common" buffer system and explain what the buffering components are.

post should be a minimum of 150 words

No hand writing please

The changes in weight during three months for six people on a diet were 10,12, 14, 16, 17, and −2 pounds. Use the sign test to find and interpret the​ P-value for testing that the probability that the weight difference is positive equals 0.50 against the alternative hypothesis that it is greater than 0.50.

1) Identify the correct null and alternative hypotheses.

I know that the correct answer for this part is:

H0 : p = 0.50

Ha : p > 0.50

2) P-value = ?

But I have no idea how to calculate the p-value here, can anyone help me?

Thanks in advance.

We would like to have a simple model to describe how temperature changes with time in your classroom during lecture in a typical day in Fall and Spring. You can consider two sets of average air temperature – one in October and other one in April for your analysis. Also, for simplicity, consider the entire room to be at one temperature T. Outside air (Ti,) comes in and reaches the temperature of the room through mixing, and this air leaves at the same rate (?). Consider all the possible modes of heat transfer that can take place through the walls (wall resistance), doors, windows (double pane vs single pane), insulation, and as well as metabolic heat generated by us (typically about 60 W per person). Perform an energy balance for the room from which you can calculate the room temperature, T. You need to account for air properties (density of 1.1769 kg/m3and specific heat of 1006 J/kg.K), room, window, and door dimensions. Consider an average air velocity through the doors as 0.1 m/s needed to calculate air flow rate ?. Ignore temperature variation in the air properties in the room. Assume reasonable parameter values needed for numerical calculations. Our goal is to calculate the classroom temperature at the end of a 75 minute lecture? Also makes some observations between cost and energy savings if you plan to incorporate any improvements.

what positive changes will come when the following measures (to enhance good governance) are brought to a school? please write separately for each one.

Eliminate the industrial age values

Implementing autonomy and control

Removal of inauthentic learning

Creating a room for passions and interests

Mode of lecturing

Explain why a corporation's WACC would likely increase if it changes the capital structure?

2. The risk as measured in standard deviations of a particular security is 10 percent and the expected return on invested amount is 13. percent. What is the CV for this security? How would you explain this number?

nswer questions a, b, b, and 6 based on the following information from the financial statements of a rporation Total assets $2 billion det Total equity S? billion Total common equity so8 billioniky Cost of preferred stock 10 percent rde Cost of common stock 13 percentg Tax rate 40 percentT Pretax cost of debt 1o percent

a- Calculate the WACC for this corporation? 00.58. What is the capital structure of this corporation in proportions?

b waht is the capital structuer of this corportions in proporions?

c-How much debt this corporation has? Answer the amount of dollars and as a percentage of assets??

Why is the new tax reform law represents the most significant tax changes in the United States in more than 30 years. The new tax brackets, modified deductions and credits, corporate tax change.

Suppose that changes in bank regulations expand the availability of credit cards, so people need to hold less cash.

a. How does this event affect the demand for money?

b. How does this event affect the money velocity?

c. If the Fed does not respond to this event, what will happen to the price level?

d. If the Fed wants to keep the price level stable, what should it do?

Suppose that changes in bank regulations expand the availability of credit cards, so people need to hold less cash.

a. How does this event affect the demand for money? (3%)

b. How does this event affect the money velocity? (3%)

c. If the Fed does not respond to this event, what will happen to the price level? (3%)

d. If the Fed wants to keep the price level stable, what should it do? (3%)