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Suppose that a hypothesis test is performed at a small significance level. State the appropriate conclusion in each case by referring to Key Fact 9.2. Key fact 9.2= If the null hypothesis is rejected, we conclude that the data provide sufficient evidence to support the alternative hypothesis. If the null hypothesis is not rejected, we conclude that the data do not provide sufficient eveidence to support the alternatrive hypothesis.
(a) The null hypothesis is rejected.
(b) The null hypothesis is not rejected.
Compute a 95% confidence interval for the population mean, based on the sample 32, 38, 31, 34, 35, 32, and 36. Change the number from 36 to 14 and recalculate the confidence interval. Using the results, describe the effect of an outlier or extreme..
Does the sample provide sufficient evidence that the mean pH level in the water differs from 8.5? Conduct a test at the ? = .01 level. What are the upper and lower limits of the 95% confidence intervals?
question 1you have been given sample data from two offices and told that the 95 confidence interval for the difference
question women make up 24 of the science and engineering workforce. in a random sample of 400 science and engineering
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snowfalls occur randomly and independently over the course of winter. the average is one snowfall every 3 days.a what
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Can we conclude that the mean age of the population from which the sample may be presumed to have been drawn is less than 60 years? Let α = .05
Why do so many of life's events share the same characteristics as the central limit theorem? Why are estimations and confidence intervals important? When might systematic sampling be biased?
In a group of 6 computer programmers, what is the probability that none are introverts? What is the probability that 4 or more are introverts?
Determine out the regression equation. Determine the estimated sales if 40 contacts are made.
Find the probability that exactly six tickets are written on a randomly selected day from this distribution.
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