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(a) What is the response variable?
(b) Is this an experimental study or an observational study? Explain your answer in at most 25-30 words.
(c) Perform a one-sample ANOVA.
(d) Is the assumption of equal variances reasonable?
(e) Is the assumption of normality reasonable?
(f) What are your conclusions in the context of the problem?
Compute the population attributable risk for smoking and lung cancer.
the mean noise level in the 171 ward areas was 58.0 decibels and the population standard deviation is 4.8. find the
the arizona department of transportation wishes to survey state residents to determine what proportion of the
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An election poll reported that a candidate had an approval rating of 48% with a margin of error E of 3%. Construct a confidence interval for the proportion of adults who approve of the candidate.
When calculating correlation coefficient, what does a value of -2 indicate? Strong negative correlation, Weak negative correlation.
a company manufactures a batteries in batches of 20 and there is a 3 rate of defects find the mean and standard
during the period of time that a local university takes phone-in registrations calls come in at the rate of one every
The Weithoff company has a contract to produce 10000 garden hoses for a customer. Weithoff has 4 different machines that can produce this kind of hose.
a new sales training program has been instituted at a rent-to-own company. prior to the training 10 employees were
Create a 90 percent confidence interval for the population proportion of all such firms with this as the primary motivation.
pick a card from a regular 52-card deck and record the suit then toss a coin and record heads or tails. let a be the
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