## Statistic Homework Need Done BY 8 Pm

3. A random variable has the following probability distribution: X        P(X) 0          0.35 1          0.30 2          0.20 3          0.10 4         0.05 A) Compute the expected value, variance and standard deviation of X. Show the computations for each of your answers. Fourteen percent (0.14) of the students in a statistics class are graduate students. A random sample of 10 students is selected. Use the binomial probability formula to determine the probability that the sample contains exactly 3 graduate students. Show your work. Nine percent (0.09) of the parts produced by a machine are defective. Twenty(20) parts are selected at random for study. A. what is the probability that at least 3 parts are defective? B. what is the probability that exactly 2 parts are defective? C. what is the expected number of defective parts in the sample? D. What is the variance and standard deviation of defective parts in the sample? Two letters are mailed to San Francisco. One was sent air mail, the other first class. From past data we know that the probability of an air mail letter arriving in 2 days is 0.55, and the probability of a first class letter arriving in 2 days is 0.35.. Assuming independence: A. What is the probability that both letters arrive in 2 days? B. What is the probability that at least one letter arrives in 2 days? C. What is the probability that none of the letters arrive in 2 days? HTML Editor Keyboard Shortc

## Financial Literacy

When it comes to a country’s economy, the spending habits of its citizens, corporations, and the government all play a role. Is saving encouraged? Does inflation hinder buying power? How do interest rates change spending and lending? Since so much of our daily lives center around financial security, it is important to understand how money and numbers can (and often are) manipulated. In this Discussion, you will analyze how a country’s financial health is related to its citizens’ financial health. To prepare for this Discussion: Review 7, 7.1, 7.3-7.7 from the course text, Math in our World. Think about how you manage your personal finances and how a government and/or financial industry might influence the way you save or spend. Should consumers save money or spend money? Think about the pros and cons of both. Analyze why and how a country’s (or the world) economy has been affected by personal, corporate, or government-related decisions. Focus your analysis from the perspective of one specific country. Reflect on how a country’s economy affects individual, family, or community spending. Focus your response on the following: One country How decisions made by (pick one of the following) individuals, corporations, or government can affect the financial health of (pick one of the following) individual citizens, families or communities Research data related to (pick one of the following) home ownership, mortgages, interest rates, inflation, and foreclosure rates or another economic measure