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The mean for statistics is 61 and the standard deviation is 6.0. For the biology test scores, the mean is 24 and the standard deviation is 3.8. The test scores of a student who took both tests are given below. A student gets a 75 on the statistics test and a 29 on the biology test
(a) transform each test score to a z-score(b) Determine on which test teh student had a better score.
Please help me with the attached pre-calculus questions. Use mathematical induction to prove that 6 is a factor of n (n + 1)(n + 2).
What are the requirements for applying the hypothesis test for the difference in two population proportions? What are the calculations (computations)?
Using a random sample of 100 workers, researchers calculate a 95% confidence interval for the average hourly wage earned by construction workers in the city of Boston. This interval they calculate is from $18 to $26.
What can you say with 95% confidence about the percent of all American adults who think that humans developed from earlier species of animals.
If employee is chosen at random, determine the probability that employee is female and salaried staff? Choose the best answer from the following.
Calculate the p- value and use it to test H0 versus H a at each of a .10, .05, .01, and .001. d How much evidence is there that the mean composite satisfaction rating exceeds 42?
The quality control department of Widgets Manufacturing needs your help. They can't decide which significance level is appropriate for testing the claim that fewer than 50% of widgets from a production run are defective.
What is an example of a research problem at your organization that would benefit from the use of either descriptive statistics or probability distribution statistics? Explain.
Compute the test statistic. At 95% confidence using the p-value approach, test to see if taking the course actually increased scores on the driving exam.
Healthcare issues are receiving much attention in both academic and political arenas. Compute the arithmetic mean age of the uninsured senior citizens to the nearest hundredth of a year.
A share tipping service claims that its selections give an average return of 10% if held for 12 months. An investor wants to investigate this claim and records the returns of the last 20 shares that have met the 12 month period.
A large population of overdue bills has balances that follow a normal curve. When we take a sample of 100 of these the average is $500 and the standard deviation is $100. (a) what statement can you make about the range $300 to $700? (b) what state..
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