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An article reported that, in a study of a particular wafer inspection process, 356 dies were examined by an inspection probe and 169 of these passed the probe. Assuming a stable process, calculate a 95% (two-sided) confidence interval for the proportion of all dies that pass the probe. (Round your answers to three decimal places.)
A company tracks the level of sales at retail outlets weekly for 36 weeks. During the first 12 weeks, a fixed level of advertising was used each week to draw in customers. During the second 12 weeks, the level of advertising changed.
Promotion occurs on average every 10 days in a large corporation. What is the probability that the next promotion will occur within:
A set of data has a mean of 66 feet and a standard deviation of 3 feet ( and has a bell shaped curve). Describe completely.
If you create a regression model for estimating the Height of a pine tree (in feet) based on the Circumference of its trunk (in inches), is the slope most likely to be 0.1, 1, 10, or 100? Explain.
mary had a foul shot average of 60 making 12 of 20 shots bill had a foul shot average of 50 making 5 of 10 shots in
Suppose that six of the 15 school buses in a particular school district have developed a slight defect since their last inspection.
Construct a relative frequency table for the data.- Display the relative frequencies in a bar graph.- What proportion of the 17,800 rhinos are African rhinos? Asian?
suppose that you must establish regulations concerning the maximum number of people who can occupy an elevator. a study
Which variable, gender or educational level, seems to have the stronger association with opinion? Explain your reasoning.
Test at the 5% significance level whether the mean evacuation time is smaller at closing time than during fire drills.
If there changes that are needed, what medications would you suggest? Why is it important to assess the above laboratory values?
Calculate an appropriate measure of central tendency and then compare the two groups in a sentence or two.
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