Consider how the intensity of light changes as it passes between two Polaroid disks at different angles to each other. (For this scenario, suppose that the polaroid closest to the light source remains fixed with the zero degree marking pointing straight up. Therefore, the second Polaroid disk is the one being rotated, and the angles for the graph should be the angle between the zero degree marking of the first disk and the position of the second disk. )

a. With intensity on the y axis, and angle in 45 degree increments on the x axis, sketch a graph of how the intensity of a light varies under various orientations of the two disks.

b. What is the mathematical relationship here? Explain how you arrived at this conclusion.

c. Based on the fact that the intensity of a light wave is proportional to the square of the electric field magnitude, explain why the transmitted intensity should have this mathematical dependence on the angle.

What changes to foreign bank operations in the United States have been brought about by the Foreign Bank Supervision and Enhancement Act of 1991?

Normative changes in cognitive function are expected with increasing age. Research on the relationship between normative cognitive decline and moderate-to-vigorous physical activity (MVPA) and sedentary behavior (SED) needs further investigation in Hispanic/Latinos adults. We assessed the association between accelerometer assessed MVPA and SED with cognitive function in 7,478 adults aged 45-74years from the Hispanic Community Health Study/Study of Latinos. At baseline, cognitive tests included two executive function tests (Digit Symbol Substitution Test (DSST), a test of language (Word Fluency), and a test of memory (Spanish English Verbal Learning Test). Multiple regression models were used to examine associations of time spent in MVPA and SED with cognitive function by age groups, adjusted for age, education, sex, acculturation, and field center. Mean time spent in sedentary behaviors was 12.3 hours/day in females and 11.9 hours/day in males. Higher SED, but not MVPA, was associated with lower DSST raw scores (β -0.03 with each 10-min increment in SED; P<0.05), indicating lower performance in executive function in all age groups. No associations were observed for MVPA and SED with tests of language or memory tests. Our findings suggest a distinct association of SED but not MVPA on executive functioning in middle-aged and older Latino adults. Further studies are needed to more conclusively determine causal links.

Question 11:

What type of study design was this? (2 points)

Question 12:

What was the exposure(s) of interest? How was it measured? (4 points)

Question 13:

What was the outcome(s) of interest? How was it measured? (4 points)

Question 14:

Which measure of disease frequency is most often reported for this type of study design? Why? (4 points)

Question 15:

What type of study design would better address the same research question? Briefly explain your reasoning in 1-2 sentences maximum. (4 points)

Q. Using appropriate models, discuss the three factors that affect changes in the net worth of a financial institution when interest rates change. Assume that only duration is used for portfolio immunization purposes..

Q. Discuss whether interest rate risk is a big concern for investors given today’s economic environment.

Consider the following instructions: show how the optimal combination of work and consumption changes after a decline in the wage rate.  Draw two graphs, one where the income effect dominates the choice of leisure and the other where the substitution effect dominates the choice of leisure.

8. Which water sample is more resistant to changes in its pH level: A sample of freshwater or a sample of saltwater? Briefly explain why you think this is. (50-100 words).
9. Please describe what will happen to a plant cell when it is put into a hypotonic environment. Please include the terms: osmosis, semi-permeable membrane, and cell wall in your answer. (50-100 words)
10. Describe what will happen to an exclusively saltwater fish (meaning it only lives in saltwater) if it is placed in a freshwater environment. Be sure to describe what will happen to the cells of the saltwater fish when put in this environment.

Which of the following policy changes would decrease the real interest rate?

A A tax cut on interest income

B A policy that decreases government consumption expenditures

C A reduction in social security benefits

D All of the above

correct answer is D

need the explianation

A device that monitors vibration changes in gas turbines has costs provided in the table below. Determine the Economic Service Life (ESL).

• Discuss how changes in the Federal Reserve’s monetary policy affect at least 1 of the 4 components of GDP (consumption, investment, government spending, net exports).
• Have the Federal Reserve’s countercyclical monetary policies been effective in moderating business cycle swings? Justify your response.

A biological psychologist wants to know if physical exercise changes reaction speed in elderly people.   A total of 18 older volunteer participants were found. One sample of n = 9 subjects received an exercise treatment, while the second sample (n = 9) of participants were given stretching lessons for the same amount of time per week. Reaction speed was tested on the computer after six weeks of treatment. Reaction speed was measured in milliseconds. Data shown below.

Why do you use this type of statistical test? _________

What is the I.V.? ___________________   What is the D.V.? ______________________

Use the data below to fill in the blanks to compute your t_calculated.

stretch group exercise group

n_stretch = 9           df_stretch = 8   n_exercise = 9              df_exercise = 8

∑X_stretch = 450        M_Stretch = 50 ∑X_exercise = 390            M _Exercise = 43.3

SS _stretch = 260    S²_stretch  = _____ SD_stretch = _____ SS_Exercise = 376   S²_Exercise = ______ SD_Exercise = ______

Use the 4 step method for hypothesis testing.

Step 1.

Step 2. alpha = .05, 2 tailed test

Step 3. Calculate your test statistic (t_calculated) (show formulas and work)

t_calculated = M_stretch – M_exercise / S_{M1– M2}

T_calculated = ___________

Step 4. State your conclusion about the null hypothesis:       Reject        or       Retain

Summarize your results in APA format.