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Recently the national average yield on municipal bonds has been μ = 4.19%. A random sample of 16 Arizona municipal bonds gave an average yield of 5.11% with a sample standard deviation s = 1.15%. Does this indicate that the population mean yield for all Arizona municipal bonds is greater than the national average? Use α = 0.05. Assume x is normally distributed.
a) State the null and the alternate hypothesis.
b) Identify the sampling distribution to be used: the standard normal distribution or the Student's t distribution. Find the critical value(s).
c) Compute the z or t value of the sample test statistic.
d) Find the P value or an interval containing the P value for the sample test statistic.
e) Based on your answers to a through d, decide whether or not to reject the null hypothesis at the given significance level. Explain your conclusion in the context of the problem.
To test whether there is any association between two variables using Chi-Square test for independence.
Assume that you have a binomial experiment with p = 0.5 and a sample size of 100. The expected value of this distribution is.
The mean of a normal probability distribution is 60; the standard deviation is 5.
Florida State University administers a mathematics placement test to students where they 1st enter the university.
Regression equation to predict the dependent variable using multiple regression analysis:
A sample of 64 Atlanta consumers showed a mean quarterly water bill of $51 with a sample standard deviation of $12. At α = .05, does the Atlanta sample support the conclusion that above-average rates exist for this private water system?
What is the equation for least squares line? Calculate the coefficient of determination.
Find out the constant using probability density function also cumulative distribution function. Assume X be a continuous random variable with probability density function.
Assume that x has a normal distribution, with the specified mean and standard deviation. Find the indicated probabilities.
Determine the probability of fatal accident over a lifetime? Describe your reasoning carefully. Hint: Suppose independent events. Why might the supposition of independence be violated?
In this table, my research is about the average amount of money people expect to spend on attomeys when they are injured. Is there a difference, depending on type of injury? Do people expect to spend more when the injury happened in a car, on job,..
At the .05 level of significance, can we conclude that those joining Weight Reducers on average will lose less than 10 pounds? Determine the p -value.
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