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The national sporting goods association conducted a survey of persons 7 years of age or older about participation in sports activities the total population in this age group was reported at 248.5 million with 120.9 million male and 127.6 million female.
Compute the within group variability. Do you require any post hoc testing? Why or why not? Decribe in detail.
Find the sample size for the 95% confidence interval used to estimate the population proportion.
Solve linear program graphically
What is the numerical value of the sample proportion p^ ? The P-value is the probability of what event?
Is there evidence of difference in mean life of bulbs produced by the two kinds of machines. What is your conclusion?
Give null and alternative hypotheses for this test in symbolic form.
Assume your statistics professor reports test grades as z-scores, and you got a score of 2.20 on the midterm exam. Write down a sentence explaining what that means.
One-way Analysis of Variance (ANOVA) test - How many treatments are there and What is the total sample size?
To demonstrate the process is in control or out of control utilizing p-chart. A company which produces nails has retained you as a consultant.
Probability based on binomial distribution - evaluate the probability of x successes in the n independent trials of the experiment.
14 machines are planned to be used for a 60-day production run for a customer. The operating time is 1660 hours. Upon failure, a machine must be returned to the manufacturer for repair.
If computing a causal linear regression model of y = a + bX and the resultant r2 is very near zero, then one would be able to conclude that:
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