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The data is based on 214 children with acute otitis media who participated in a randomized clinical trail each child had OME at the beginning of the study in either one or both ears and was randomly assigned to receive a 14 day course of one of two antibiotics, either cefaclor or amoxicillin. The data here concern the 203 children whose middle ear status was determined during a 14 day follow up visit.
Create a stem-and-leaf display of these data. Create a box plot of these data.
By using the age midpoints x and the percentages of nurses, do we have a valid probability distribution? Describe.
Suppose 40% of a student population possess works part-time. If a random sample of size 300 is drawn from the population, what is the probability that 44% or fewer of the samples works part-time?
Suppose we conduct an ANOVA test of four treatment means and reject the null hypothesis. Construction of a confidence interval for the difference between the first and second sample mean revealed the interval to be 10 plus or minus 12. We conclude
It could not do anything with the airport and suffer a loss of revenue. The current value of raised revenue from a new airport is in question.
Determine critical value for boundary of the rejection region (i.e., Zα).
Based on a scatter diagram, would you estimate the linear correlation coefficient to be:
A professor asked her sophomore students, "How many drinks do you typically have per session? (A drink is defined as one 12oz beer, one 4oz glass of wine, or one 1oz shot of liquor.)"
Students in the industrial statistics lab at ASU calculate a lot of confidence intervals on mu. Suppose all these CIs are independent of each other.
Determine the optimum solution for the problem.
The Kruskal-Wallis rank test is a nonparametric replacement - The Wilcoxon rank sum test tests a null hypothesis
One use of the Chi-square goodness of fit test is to determine if specified multinominal probabilities in the null hypothesis is correct.
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