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How is an ANOVA used, what is the difference between comparing mean and comparing variances, what are the differences between one-way and two-way ANOVA?
What are the five steps in the hypothesis testing procedure, what does each step represent, what are the advantages and disadvantages of using a hypothesis testing procedure?
What is the significance of a 5% significance level? Why would you choose 5% as opposed to 10%? What are the statistically accepted guidelines for significance levels?
Out of forty students, 14 are taking English Composition and 29 are taking Chemistry. If five students are in both classes, how many students are in neither class? How many are ineither class?
Given the following data on hotel check-ins for a 6-month period:
Describe the standard normal distribution. Explain why it can be used to find probabilities for all normal distributions.
By constructing null and alternative hypotheses, computing critical values, and comparing test statistic to critical value.
Construct a frequency distribution (class, tally and frequency) for the data set using the indicated number of classes. In the table, include the midpoint, relative frequencies and cumulative frequencies.
By using significance level a = .05, and suppose a normal distribution what does evidence conclude?
If the variability of the filling machine is reduced to 0.025 ounce, verify that this will lower the required average amount of coffee to 4.050 ounces and yet keep 98 percent of the jars above 4 ounces.
Utilizing the chart parameters developed above to define the control charts for future candy bar production, Compute the appropriate plotting points from the data.
For any distribution the score that separates the highest 10% from the rest of scores is called.
What is the real world value of the y-intercept and slope in a regression equation? Other than statistics problems, why should I care?
What is the minimum-cost order quantity for the shoes? What are the annual savings of your inventory policy over the policy currently being used by Keith?
The length of a Colorado brook trout is normally distributed. What is the probability that a brook trout's length:
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