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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?
Determine the mean and standard deviation of the data. What percentage of the data lies within one standard deviation of the mean value?
Elucidate this data use an appropriate statistical test to explain whether the population mean TV "on" time has declined in the past decade.
Perform a proper analysis. Describe your null and alternative hypothesis, report the p-value. What is your conclusion?
A vending machine dispenses coffee into a twelve ounce cup. The amount of coffee dispensed into the cup is normally distributed with a standard deviation of 0.08 ounce.
Test hypothesis that Site B is more successful in initiating acquaintances than Site A. Use alpha = .05.
Let x1, ..., xn be a random sample from an exponential distribution, X ~ EXP(theta) a) If x(bar) = 17.9 with n = 50, then find a one-sided lower 95% confidence limit for theta.
Part 1: Define and explain historical research. Explain a situation in which historical research would be appropriate. Part 2: Explain the difference between external and internal evidence and give examples of each.
At α = .01, did yellow fire trucks have a considerably lower accident rate? Determine sample proportions and z test statistic.
How many boxes must the processor sample to be 95 percent confident that the sample mean does not differ from the population mean by more than 0.2 pounds?
Determine the largest plausible average balance for the accounts of those using her managed fund in which you could have 90% confidence.
In a survey about soft drinks it was found that 5% of the respondents like diet soft drinks. 12% of them liked the brand Coke. Of all the Diet soda drinkers 40% liked Coke.
What is the probability of finding a sheet chosen at random which contains 3 or more surface flaws and find the greatest standard deviation,
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