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Why do we use graphical displays of the data from our research, such as Pareto Charts, Bar Charts, Pie Charts, Flow Charts, or Process Control Charts? How has the graphical display of data changed in the last 10 years? How will it change in the next 10 years?
At the .05 significance level, can we conclude that the guideline is still reasonable?
At the .05 significance level, is the number of units produced on the afternoon shift larger?
In each of the following cases, decide whether or not a binomial distribution is an appropriate model, and give your reasons.
Estimate a test statistic for null hypothesis H0: μ = 30 against two-sided alternative hypothesis H1 : μ ≠ 30, and by plotting this on its reference distribution.
What is the best estimate of the average tread life in miles for the entire population of these tires?
What is the probability that the drug will be effective for 2 hours or less?
Which test do we use to see if the difference in our sample is statistically significant? Why? Should it be one or two-tailed?
What is sampling with replacement, and why it is used?
Concept of statistical signi cance
How would you use the binomial distribution in making a business decision during a normal day of work in the career of your choice?
Let z represent the standard normal variable and suppose a value is randomly selected. Find each of the following probabilities by:
A pair of dice is rolled. What is the probability of each of the following? (Round your answers to three decimal places.)
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