The data set data_ksubs.csv contains information on net financial wealth (nettf a), age of the survey respondent (age), annual family income (inc), family size (fsize), and participation in certain pension plans for people in the United States. The wealth and income variables are both recorded in thousands of dollars. In particular, the variable e401k is equal to 1 is the person is eligible for 401k, a retirement savings plan sponsored by the employer, and 0 otherwise.

a. Create a scatter plot of nettf a against inc. Can you observe any visible correlation between nettf a and inc? Do you think that a regression of nettf a on inc may feature heteroskedasticity? Explain.

In a recent study, the Centers for Disease Control and Prevention reported that diastolic blood pressures of adult women in the United States are approximately normally distributed with mean 80.3 and standard deviation 10.1. (a) What proportion of women have blood pressures lower than 73? (b) What proportion of women have blood pressures between 74 and 90? (c) A diastolic blood pressure greater than 90 is classified as hypertension (high blood pressure). What proportion of women have hypertension? (d) Is it unusual for a woman to have a blood pressure lower than 66? Round the answers to four decimal places.

We learned about PD-1 and CTLA4 under the topic - costimulation. Feel free to revisit that topic. Now explain (with precise cellular and molecular processes related words) that how anti-PD1 and anti-CTLA4 antibodies are likely to treat cancer.

"In the 1890s, oncologist William Coley began to inject cancer patients who had inoperable tumors with a mixture of killed bacteria. Coley reported success with the approach and “Coley’s toxins” were sold as a cancer therapy in the United States even into the 1960s." This concept became the premise for one of the approaches in modern day immunotherapy. What is the concept underlying Coley's experiments?

Why do minimum wage laws in Italy and Spain result in a greater prevalence of workers being hired in unreported jobs "off the books" than do minimum wage laws in the United States?

Cost-push inflation:
A. reduces real output.
B. increases real output.
C. reduces the unemployment rate.
D. raises the natural rate of unemployment.

Which of the following is the largest dollar amount in the United States?
A. disposable income
B. personal income
C. gross domestic product
D. national income

Real GDP is:
A. the nominal value of all goods and services produced in the economy.
B. the nominal value of all goods and services produced in the domestic economy corrected for inflation or deflation.
C. that aggregate output that is produced when the economy is operating at full employment.
D. always greater than nominal GDP.

John Wayne Like a lot of other Americans. John Wayne died of cancer. But is there more to this story? In 1955. Wayne was in Utah shooting the film The Conqueror. Across the state line. in Nevada. the United States military was testing atomic bombs. Radioactive fallout from those tests drifted across the filming location. A total of 46 of the 220 people working on the film eventually died of cancer. Cancer experts estimate that one would expect only about 30 cancer deaths in a group this size.
a) Is the death rate among the movie crew unusually high?
b) Does this prove that exposure to radiation increases the risk of cancer?

Phillis Wheatley (featured in the documents on pages 141–146) is considered the first African-American woman poet of the United States. As you can see from the documents in our textbook, beyond being a published poet she had recognized correspondence with a number of state leaders, including George Washington (the letter not printed in that section, unfortunately, but you may read His Excellency General Washington (Links to an external site.)Links to an external site... How does Wheatley challenge or contradict the image of a "slave woman" in the Revolutionary period? Refer to at least one specific poem or letter in your response of at least 250 words.

What is the current U.S. trade balance? You have just read arguments for and against sustaining a trade deficit—which do you find more persuasive and why? Does your answer change depending on the country you think about (i.e. would you give one answer for the United States, another for Japan, and another for Peru?). What is the relationship between trade deficits and the potential for financial crises? How can trade deficits have a positive economic effect in a country? Again, does a state’s ability to sustain trade deficits depend on the size and/or strength of its economy? (15 points).