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Show Arizona municipal bond Problem - Normal Distribution 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 populations mean yield for all Arizona municipal bonds is greater than the national average? Use α = 0.05. Assume x is normally distributed.
a) Position the null and the alternate hypothesis.
b) Recognize the sampling distribution to be used: the standard normal distribution or the Student's t distribution. Find critical value(s).
c) Calculate the z or t value of the sample test statistic.
d) Find out the P value or an interval containing the P value for the sample test statistic.
e) Based on the 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.
Do any of the selected samples seem to be out of the control limits? Describe.
Find out the expected winnings for a person who buys one ticket.
Calculate descriptive statistics for each stock and the S&P 500. Comment on your results. Which stocks are the most volatile? Calculate the value of beta for each stock.
A teacher gave a 25 question multiple choice test. After scoring the tests, she computed a mean and standard deviation of the scores. The standard deviation was 0. Based on this information
Describe the data appear the strength of the relationship among variables is sufficient to warrant using linear regression forecasting.
If it is determined that there is no difference between the population mean being represented by the sample and the mean of the population at large, then:
The reason why we finish our calculation by dividing range by 4 is that in most data sets 95% of the data values fall within two standard deviations of the mean.
Assume 1.5% of antennas on new Nokia cell phones are imperfect. For random sample of 200 antennas, determine the probability that: None of the antennas is defective.
Any analysis required to check the required conditions (note that if you find that you cannot meet the required conditions for the test you expected to do, you must use the appropriate non-parametric test)
Compute the variance and standard deviation of the number that will arrive within two days.
To test the given claim using Single Proportion Z test.
If there is relationship between parental income and SAT score, why can't we bring to a close that differences in score are caused by differences in parental income.
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