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Pollsters try to determine whether or not a person is a "likely voter" before they count their opinion in a poll. If we assume 40% of the registered voters will actually vote, in a random sample of 100 registered voters we can be 95% confident that somewhere between _____ and _____ of them will actually vote. Fill in the blanks with a number.
Find the correlation coefficient for the data. Find the equation for the regression line for the data and predict the final grade of a student who misses 3.5 days.
Determine the probability that particular call lasted between 110 and 180 seconds?
Draw suitable distribution curve indicating position of the TS and CV.
What is the probability that Sara will die in her 60 th year? Using this probability and the $50,000 death benefit, what is the expected loss to Big Rock Insurance?
How many students should be surveyed to estimate the mean score within 25 points with 90% confidence?
A scientist examined the effect of temperature and catalyst on the yield of a reaction. He ran the experiment at both 150° and 200°C with two types of catalyst.
Use a calculator with mean and standard deviation keys to verify that the sample mean is x = 5.63 pups with the sample standard deviation s = 1.78 pups. (b) Find a 75% confidence interval for the population.
ABC Corp. is a firm with all-equity financing. Its equity beta is .80. The Treasury bill rate is 4 per cent and, and the market risk premium is expected to be 10 per cent. What is ABC's asset(equity) beta?
Construct and interpret 90 percent on confidence interval for the mean. Be sure to interpret the meaning of this interval.
The test statistic for a two-sided significance test for a population mean is z = -2.12. What is the corresponding P -value?
Do the association between the sizes of the heads and bodies of the two species appear to be strong? Explain.
The analysis needs to be re-run adding the error into the regression sum of squares.
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