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Television stations sometimes solicit feedback volunteered by viewers about a tele-vised event. Following a televised debate between Barack Obama and Mitt Romney in the 2012 presidential election campaign, a TV station conducted a telephone poll to determine the "winner." Callers were given two phone numbers, one for Obama and the other for Romney, to register their opinions automatically.
(a) Comment on whether or not this was a random sample.
(b) How might this poll have been improved?
Three players A, B, and C take turns tossing a fair coin. Suppose that A tosses the coin first, B tosses second, and C tosses third; and this cycle
A bag contains four chips of which one is red, one is blue, one is green, and one is yellow. A chip is selected at random from the bag and then replace
Determine the rejection region for the hypothesis Ho : mean D= 0 if H a : mean D > 0. Use a = 0.01. z>
What will be your total profit or loss on all the transactions related to these option positions if the stock price is $28.40 on the day the options expire?
In 1991, 72% of children in the United States were living with both parents, 22% were living with mother only, 3% were living with father only.
Problem: A random sample of 225 adults was given an IQ test. It wasfound that 105 of them scored higher than100 . Based on this, compute a 95% confidence interval for the proportion of all adults whose IQ score isgreater than 100. Then complete th..
the mean of sample a is significantly different than the mean of sample b. sample a 59 41 74 62 87 73 sample b 53 67 85
State the null and alternative hypotheses for this test. Calculate the test statistic for this test. Explain what this test statistic represents.
Analyze the causes of the Great War. Explain how the war was fought in Europe. What steps led to the U.S. involvement in World War One?
Suppose college women's heights are approximately Normally distributed with a mean of 65 inches and a population standard deviation of 2.5 inches.
Calculate the rate of return available to shareholders for a company financing $1 million of assets with the following three arrangements:
use multiple regression to find the line of best fit through the following data. what does this tell
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