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In order to ?nd out whether children with chronic diarrhea have the same average hemo- globin level (Hb) that is normally seen in healthy children in the same area, a random sample of 10 children with chronic diarrhea are selected and their Hb levels (g/dL) are obtained as follows.
12.3 11.4 14.2 15.3 14.8 13.8 11.1 15.1 15.8 13.2
Do the data provide suf?cient evidence to indicate that the mean Hb level for children with chronic diarrhea is less than that of the normal value of 14.6 g/dL? Test the appropriate hypothesis using α = 0.01. Draw a box plot and normal plot for this data, and comment.
the machining center at a production facility has three lathes of differing ages and thus precision. the oldest machine
Does this sample show sufficient evidence that the private university loan default rate is below the rate for all universities, using a left-tailed = .01. That is, do you reject the null hypothesis?
What is the profit if the traditional contribution margin method is used for determining CKC's product mix? What is the profit if the bottleneck method advocated by Troy is used for selecting the product mix?
suppose a population consists of n pairs of people meaning there 2n people in the population. suppose k of the people
An automobile assembly line operation has a scheduled mean completion time of 2.2 minutes. Because of the effect of completion time on both preceding and subsequent assembly operations, it is important to maintain the 2.2 minute mean completion ti..
If a survey of 109 randomly selected united states residents is to be taken, what is the approximate probability that at least 60 will be under 31 years of age?
Find the probability that a value randomly selected from this population will have a value between 90 and 130.
question in order to determine an interval for the mean of a population with unknown standard deviation a sample of 61
Scores of an aptitude test are normally distributed with a mean of 280 and a standard deviation of 30. Determine the percentage of samples of size 4 that have a mean score within 21 points of the population mean score of 280.
an article in the journal of composite materials vol 23 1989 p. 1200 describes the effect of delamination on the
Determine, with 95% confidence, if the stocks from "socially conscious" companies are different from the mean P/E ratio of all other major stocks.
describe the role and importance of listening skills in cross-cultural communication. how can these skills be learned
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