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Fox News reports that People are all excited because they have taken an exit poll of 1200 voters and found that 50.5% of the voters say that they voted for Richard Nixon and they predict that he will be president. Test this claim using a 1 % significance level. (α=0.01)
Define your hypothesis.
Calculate the test statistic. By hand or by calculator.
Calculate the proper critical value.
Find the probability value (p value).
Is this a right tailed test, left tail or two tails?
Clear statement about what the test determines. Do you believe the prediction?
TV safety. The manufacturer of a metal stand for home TV sets must be sure that its product will not fail under the weight of the TV.
What assumptions does he need to draw conclusions? What might he conclude? Give reasons for your answers.
Construct a 95% confidence interval for the population mean, assuming a normal distribution?
The Center for Disease Control and Prevention estimates the number of persons aged 13 and older living with HIV is 1.1 million.
1. Let A be a symmetric positive semidefinite matrix of order n X n. Show that v'Av = 0 if and only if Av = 0.- Show that tr (A'A) = 0 if and only if A = 0.
Investigate different classification approaches; the idea is to apply different classification techniques to a challenging dataset, to compare the results.
testing for population mean.the average fee charged by a large accounting firm to prepare an individual income tax
A student's reaction to the instructor's statement that covariance analysis is inappropriate when the treatment regression lines do not have the same slope was as follows:
A final exam in Math 157 is normally distributed and has a mean of 75 with a standard deviation of 12. If 36 students are randomly selected, find the probability that the mean of their test scores is greater than 70.
Suppose you perform a multiple regression to predict crime rate in a state and includes as indicators of predictions the homeownership rate divorce rate
let x denote the number of ticketed airline passengers denied a flight because of overbooking. suppse that x is a
At the 99% level, what is your estimate of the population value?
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