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Describe whether each distribution below is skewed. Tell why you think so?
1. Lengths of pant legs cut and sewn to be 32" long.
2. The times for 300 college students of introductory statistics to complete a one-hour times exam.
The point estimate for the difference between the proportions is:
Build a scatter plot, Find the value of the linear correlation coefficient r, and find the critical value of r using α=0.05. Determine whether there is sufficient evidence to support a claim of a linear correlation between the two variables.
Suppose that an IQ test was given to a large group of persons, the scores are assumed to be from a normally distributed population, that mean = 100 and s (standard deviation) = 15.
Using the first two digits of the measurement as your stem, construct a stem and leaf display of the data above.
What is the probability that the cereal would be high calorie? In other words, what is P (high calorie)?
Find out a linear equation in the form P = mt + b (y = mx + b) that gives the population, P, t years from 2010.
A single-sample acceptance attributes sampling plan is required to have a producer's risk of 0.06 for an acceptable quality level of 0.5% nonconforming, and a consumer's risk of 0.10 for a rejectable quality level of 5% nonconforming. Use Minitab ..
In a poll of 1,004 adults, 93% indicated that restaurants and bars should refuse service to patrons who have had too much to drink. Construct the 90% confidence interval for the proportion of all adults who feel the identical way.
Make three-month and four-month moving averages for this time series. Does the three-month or four month moving average provide the better forecast? Explain.
Construct a 98 percent confidence interval estimate of the difference between the two sample means (Please show work).
Whenever the calculated value of t is equal to or greater than the tabled value of t, for a given number of degrees of freedom, then
The average on an exam is 75 and the standard deviation is 17. If the instructor assigned grades based on the Normal distribution what percentage of students will make A's and what percentage will make B;s in teh exam. Assume standard cut-off for ..
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