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The time (in seconds) needed to complete a critical task on an assembly line was measured for a sample of 50 assemblies.The date is displayed in the accompanying table.40.3 41.9 44.4 42.8 41.1 42.2 40.7 46.8 40.5 40.644.5 43.1 40.1 40.7 40.9 40.7 40.2 40.6 47.9 41.041.1 44.6 40.2 43.1 41.1 42.1 40.6 41.5 40.2 40.340.9 40.0 41.6 40.2 44.4 44.2 40.2 40.1 41.4 44.143.7 42.7 42.4 42.8 41.0 40.7 43.4 45.7 40.7 40.4
Using the stem and leaf technique, construct a less-than cumulative frequency distribution. -Draw to scale a histogram, frequency polygon and less-than cumulative ogive using the information from 1. Use the ogive to determine the range and the mid80% range. Determine the coefficient of variation. Interpret your answer.
We could then perhaps form a linear regression by charting the points of IQ for each person and their mother on a graph to determine if a correlation can be made between the IQ score of the individual and the IQ score of the mother. If the scores ..
The following data resulted from an experiment to study the effects of leaf removal on the ability of fruit of a certain type to mature:
Write three quadratic equations within a, b, c (coefficients of x^2, x and the constant as 1 integers, 2 rational, 3 irrational numbers).
Find a 95% confidence interval for the mean dielectric strength of the oil.
Joe Mauer of the Minnesota Twins had the highest batting average in the 2009 Major League Baseball season. His average was .461. So assume the probability of getting a hit is .461 for each time he batted. In a particular game, assume he batted fou..
Could you please show me how you computed the two critical values to (2.18, 17.83) ? Which formula you used ?
If the writing scores for the population have a standard deviation of σ = 20, does the sample provide enough evidence to conclude that the new composition course has a significant effect?
Electronic teller machine during the prime shopping hours in a department store. What is the probability that Exactly six people will use the machine during a randomly selected hour.
20% of teenagers in a small town say they like reading news online. Suppose you randomly select 7 teenagers from the town and ask them whether or not they enjoy reading news online. Find the probability that at least 3 say they enjoy reading news ..
Describe the target population, sampling frame, sampling unit, and observation unit. Discuss any possible sources of selection bias or inaccuracy of responses.
What is the relationship between confidence intervals and hypothesis testing? How are they the same? How are they different?
Calculate a 95% confidence interval on the average weight of packaged mustard seed. Explain very carefully to the packaging workers what the 95% confidence interval numbers mean. Include your Excel output. Is there anything you would want to note ..
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