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2. Suppose than an instructor want wants to investigate whether the font used on an exam affects student performance as measured by the final exam score. She uses four different fonts (time , courier, helvetica, comic sans ) and randomly assigns her 40 students to one of these four fonts. a. Identify the explanatory and response variables in this study. b. Is this an observational study or a randomized experiment? Explain how you know. c. Even though the subjects in this study were not randomly selected from a population, it's still appropriate to conduct an analysis of variance .Explain why.
What is the expected total inventory holding and ordering cost per year and how many days should one order last on average?
Find the indicated probabilities using Poisson distribution. Then determine if the events are unusual. A newspaper finds that the mean of typo error is five. Find the probability that a) exactly for errors found on a page, b)at most for errors ..
Find the correlation between ANCA and the clinical manifestations - Please describe which tests you used and write a short narration to explain the results.
What is the probability that at least 375 of the 500 complaints will be settled this year?
Where y∗i = a1 · yi + a2, for i = 1, ..., n, and a1 and a2 are known positive constants?
The shelf life of a battery produced by one major company is known to be Normally distributed, with a mean life of 4 years and a standard deviation of 1 years.
Calculate the ARL and look at the chart to see if the number looks about right. Use the time information in the raw data and your ARL value to calculate how many minutes between a false alarm. Will the operators be happy with this?
The symmetric approximation and Monte Carlo risk approaches
question 1nbsp calculating a z-score and graphing a box plotnbsplook at the data under dietarysupp.nbsp the table gives
A population standard deviation
the business manager of a large corporation wanted to determine whether there was a difference between what salesmen
the requirement is to write a report about wave equation confinement method through fourier series and finite element
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