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Construct a one-page description to introduce one-way ANOVA. you need to mention why ANOVA is useful, how it is carried out, and introduce the related terminology.
a researcher wants to estimate at a 99 confidence level the mean age of all persons who own sports cars. it is known
A random sample of gasoline taxes (in cents) is shown here for 12 states. Use the data to estimate the true population mean gasoline tax with 90% confidence. Does your interval contain the national average of 44.7 cents?
In estimating a 95% confidence interval estimate of the average number of days absent for the company's workers last year should you use a z or t value in the formula?
Discuss some of the advantages and disadvantages of the WHO protocol versus the single test. Give the assumptions that you have made in carrying out calculations.
A travel agent suggests that since the law of averages makes it highly unlikely to have two plane crashes within a few weeks of each other, flying soon after a crash is the safest time. What do you think?
Assuming the manufacturer's claim is correct, what is the probability the mean of the sample is 12.22 ounces or more? Using your answer form part (a), what do you think of the manufacturer's claim?
Suppose that X represents diameter measurements from a gamma distribution with a mean of 3 mm and a variance of 1.5 mm^2.
a population has a mean u72 and a standard deviation o25. find the mean and standard deviation of a sampling
What is the null hypothesis? Use a = 0.05 .
What is the probability you will have 20 or less flights that are late? What is the probability you will have more than 100 on time?
Of those mountain climbers who attempt mt. McKinley, only 60% reach the summit. In a random sample of 14 mountain climbers who are going to attempt mt. McKinley, what is the probability of each of the following?
A teacher gives a pre and post test to her students, she wants to know if there is a difference in the number of points students earned on their pretest and post test.
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