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There is not enough evidence against the null hypothesis. Suppose that Is set at .05. Should different decisions be made if the p-value is 0.0499 or 0.0501? It seems unlikely that extremely minor differences in the p-value should lead to such dramatic differences in conclusions. Obvious tests In many cases, hypothesis testing is used when the evidence is obvious. For example, why would you even bother testing if the true mean is 50 ppm?
What is the probability that the project will be completed in 17 months or less?
Suppose 31% offer both retirement plans and life insurance as benefits. If a small company is randomly selected, determine the following probabilties:
A sample of 25 students enrolled in the university indicates that X (bar) = $285.4 and s = $42.20. Using the 0.05 level of significance, is there evidence that the population mean is above $300?
Find the standardized test statistic to test the claim that mean1 = mean 2. Two samples are randomlu selected from each population. The sample statistics are given below.
Random from a large production had 8 defective discs. Determine a 98% confidence interval for the population proportion of the defective disc drives.
Such that setting the two equations together we see that at t=4 seconds, the distance that Peter travelled is the same as the distance of the room 40ft.
Establish a 99% Confidence interval about the difference in the proportion of the town voters and county voters who favor the proposal.
Select the answer for each question. What type of probability distribution can be used to figure out her chance of getting 10 questions right?
Find the average cost of a loaf of bread in your area and compute the cost per day for one year. (Remember that average is the mean, median, mode, and midrange, but choose the best for the data.) 1. What measures of central tendency did you use?
A random sample of n=9 men between 30-39 years old is asked to do as many sit ups as they can in one minute. The mean number is x=26.2 and the standard deviation is s=6. Find a 95% confidence interval for the population mean.
Compute the incidence proportion or the risk ratio that compares group 1 to group 0, and compute the Incidence proportion or the risk ratio which compares group 2 to group 0. Then post a summary of your findings.
Probability using Pareto chart - Evaluate the probability of randomly selecting an adult from the sample who doesn't always eat healthy foods because he or she has no time to cook or is confused about nutrition.
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