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"You are completing a one sample, right tailed test of proportions; level of significance is 0.01; calculated z-value is 2.50;
What is the critical z-value?What is the rejection criteria?What is the p-value?
What is the decision regarding H0? "
"Imagine you are conducting a left tailed test of proportions; level of significance is 0.05; calculated z-value is -2.00;
What is the critical z-value?
What is the p-value?
What is the decision regarding H0? and why ?"
There are 10 questions on a true-false test. A student feels unprepared for this test and randomly guesses the answer for each of these.
Describe the difference between sample and a sampling distribution. Your reply must be in complete sentences and you may use sketches to help you.
She decided to investigate and gather the following sample information. Would it be reasonable for her to conclude that union nurses earn more? Use the .02 significance level. What is the p value?
Alternative C would have fixed costs of $100,000 and variable costs of $15 per unit. Revenue is expected to be $50 per unit. Which alternative has the lowest break-even quantity?
What types of graphical presentation (histogram, dot plot, stem-and-leaf, bar chart, etc.) would you include? Explain your reasoning.
A sample of 23 European countries found that variance of life expectancy was 7.3 years. Determine the 95% confidence interval estimate for variance of life expectancy in Europe?
Critique the HR manager's planned approach and give him advice on how to proceed. You can assume that a reasonable estimate for the proportion of new hires that are happy with the company is .8.
What fraction of the calls last between 4.2 and 5 minutes?
Students will conduct one brief research exercise that will be written up as a research report using APA style.
In an exam, the mean score is 70 and the variance is 16. What is the probability that a student's score will lie within the "54 to 86" range?
What is the probability that there are less than 500 nails in a randomly selected five pound box of nails?
Find a 90% confidence interval for the population average µ of the percentage of hospitals providing at least some charity care.
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