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Computing the mean, standard deviation values for the given data.
1. Choose the most appropriate and precise type of statistical method you would use for the following situation: You want to find the average exit exam score for the 90 students in your classes.a) Randomly select 10 students, compute , generate a confidence interval.b) Generate a histogram for all scores and estimate the middle of the graph.c) Organize the data with a stem-leaf plot and estimate the middle of the graph.d) Calculate µX (entire population is available) using "1 var stats" on the calculator for all scores.
2. Explain how statistics is being misused in this situation: A parent distributes a survey at a parent-teacher organization meeting (20 parents are present) in regards to a new school policy allowing seniors to leave campus during lunch. 70% of parents who mailed in their survey responded that they opposed the new policy. The parent uses this response to claim that the majority of parents oppose seniors leaving campus at lunch.a) 30 is less than the 32 necessary for the Central Limit Theoremb) Voluntary Response; parents opposed to the policy may be more emotional about the issue therefore more likely to respond.c) There may have been biased questions on the survey.d) The hypotheses were not clearly established.
Determine the level of measurement for these items related to the newspaper business? The following data gives the weekly amounts spent on groceries for sample of households.
The following data on annual rates of return were collected from five stocks listed on the New York Stock Exchange ("the big board") and five stocks listed on NASDAQ.
How to do multiple regression using Excel and the Megastat plugin. Students are given step-by-step instructions on how to use the MegaStat plugin for Excel and told why Excel's Data Analysis Toolpak isn't reliable for rigorous statistical analysis..
(a) Consider a normal distribution with mean μ = 88. If 2% of the values lie below x = 50, find the standard deviation σ. (b) Consider a normal distribution with standard deviation σ = 15.6. If 10% of the values lie above x = 17.2, find the mean μ.
What can you conclude from Chebyshev's theorem about the percentage of adults in the town whose heights are between 57.3 and 77.7 inches? Please show work.
Consider a worker-paced line with three process steps, each of which is staffed with one worker. The sequence of the three steps does not matter for the completion of the product.
The diameters of ball bearings are distributed normally. The mean diameter is 74 millimeters and the variance is 16. Find the probability that the diameter of a selected bearing is less than 78 millimeters.
using t test for significance of slope to determine whether the independent variable is a significant predictornbsp of
Briefly identify and contrast the methods used by the psychoanalytic perspective, the humanistic perspective, and the trait perspective to assess personality.
By using the 0.10 level of significance, is there evidence that the population mean is above the $300?
They became ________ likely to underperform on aptitude tests and ________ likely to become aggressive toward someone who had insulted them.
Tom Smith wants to test the hypothesis that adult men have a mean weight that is greater than 150 pounds. Tom surveys the adult male members of his family and obtains 40 sample values
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