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The scores on this exam for all students statewide have a normal distribution with a mean of 531 and a standard deviation of 30. A local Junior High principal has decided to give an award to any student who scores in the top 15% of statewide scores. How high should a student score be to win this award?
What does this story say about hypothesis testing and research? What is the likelihood of this happening? There are number of safeguards in place so this should not happen.
Drug manufacturer knows that for a certain antibiotics, the average number of doses ordered for a patient is 20. Steve Simmons, a salesman for the company
Read the data from the fictitious research study regarding diabetes and alcohol consumption, and analyze and interpret the results.
The assembly time for a product is uniformly distributed between 6 to 10 minutes.
Which of the following statements isn't a property of the normal probability distribution? Please explain briefly why
The manufacturer of a computer terminal reports in its advertising that the mean life of the terminal, under normal use, is 6 years, with a standard deviation of 1.4 years.
Company A is hoping to expand its operations and a small group of investors is visiting next week. You are tasked with the duty of explaining how Company A uses this information from a linear programming model to optimize its shipping.
By using the 0.10 level of significance, is there evidence that the population mean is above the $300?
Public health statistics indicate that about 26.4% of Americans smoke. Suppose a random sample of 50 people is selected. Approximate the distribution of the same proportion with the normal model.
Provide a 95% confidence interval for the difference between the two population means. Compare the means of population 1 and population 2. Are they equal? Show your test procedure.
The probability of success for any trial of a binomial experiment is 25%. Find the probability that the proportion of successes in a sample of 500 is less that 22%. Repeat with a sample of 800. Repeat with a sample of 1,000.
What score was earned by more students than any other score? Why? What was the highest score earned on the exam?
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