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An Associated Press-GfK Poll shows that 38% of American drivers favor U.S. cars, while 33% prefer Asian brands, with the remaining 29% going for other foreign cars (www .msnbc.com, April 2 1 , 2010). This highlights a significant improvement for U.S. automakers, especially when just a few years ago General Motors Co. and Chrysler LLC needed government help just to survive. Perhaps Americans are giving U.S. automakers a closer look due to their buffed-up offerings and Toyota's safety concerns. A researcher believes that the "buy American" sentiment may also be the result of watching an iconic American industry beaten down amid the Great Recession. He wonders whether the preferences for cars have changed since the Associated Press-GfK Poll. He surveys 200 Americans and finds that the number of respondents in the survey who prefer American, Asian, and other foreign cars are 66, 70, and 64, respectively. At the 5% significance level, can the researcher conclude that preferences have changed since the Associated Press-GfK Poll?
MATH1550H: Assignment: Question: A word is selected at random from the following poem of Persian poet and mathematician Omar Khayyam (1048-1131), translated by English poet Edward Fitzgerald (1808-1883). Find the expected value of the length of th..
MATH1550H: Assignment: Question: what is the least number of applicants that should be interviewed so as to have at least 50% chance of finding one such secretary?
MATH1550H: Assignment: Question: Experience shows that X, the number of customers entering a post office during any period of time t, is a random variable the probability mass function of which is of the form
MATH1550H: Assignment:Questions: (Genetics) What is the probability that at most two of the offspring are aa?
MATH1550H: Assignment: Questions: Let’s assume the department of Mathematics of Trent University has 11 faculty members. For i = 0; 1; 2; 3; find pi, the probability that i of them were born on Canada Day using the binomial distributions.
Caselet on McDonald’s vs. Burger King - Waiting time
Generate descriptive statistics. Create a stem-and-leaf plot of the data and box plot of the data.
Problems on Sampling Variability and Standard Error and Confidence Intervals
Estimate the population mean
Conduct a marketing experiment in which students are to taste one of two different brands of soft drink
Find out the probability
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