Proportion of test takers
If IQ scores are normally distributed with a mean of 100 points and a standard deviation of 15 points, what proportion of test takers have a score equal or greater than 115?
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Construct a summary table and a horizontal bar graph to describe the ice types of the 504 melt ponds. Find a 90% confidence interval for the true mean visible albedo value of all Canadian Arctic ice ponds in column L to T.
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Find the test statistic, P-value, and critical value. Round to 3 decimal places. Claim: The mean IQ score of statistics professors is greater than 118. Sample data: n = 50, x = 120. Assume that ? = 15 and the significance level is ? = .05
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What are the Z scores above and below the mean that contain the middle 90% of a normal distribution?
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What kind fo test should we use to evaluate whether there are differences in the proportion of people with cancer in the different power line exposure groups? State any assumptions that are required to perform the test and evaluate whether they ar
Explain how you would select a distribution for a hypothesis test or confidence interval?
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