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An investigator wants to test if there is a difference in endotoxin levels in children who are exposed to endotoxin (what type of variable is this?) as a function of their proximity to operating farms (categorized into 4 groups). The following are endotoxin levels in units per milligram of dust sampled from children's mattresses, organized by children's proximity to farms.
Within 5 miles
5-24.9 miles
25-49.9 miles
50 miles or more
54
28
37
36
62
42
29
19
78
39
30
22
90
81
Select the most appropriate test statistic and run the appropriate test at a 5% level of significance. Calculate the appropriate test statistic (step 4 of the hypothesis testing). Round to 3 decimals
Suppose also that the mean score on test A is 85, and the standard deviation is 10; the mean score on test B is 90, and the standard deviation is 16; the scores on the two tests have a bivariate normal distribution; and the correlation of the two ..
During the war with Iraq in 1991 the Terraco Motor Company produced a lightweight, all terrain vehicle code named "J99 Terra" for the military. The company is now planning to sell the Terra to the public.
Medium-sized college town were surveyed, and it was found that 110 were regular voters. Estimate the true proportion of regular voters with 90% confidence and comment on your results.
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Utilizing the 5% level of significance as there was a significant change in cholesterol level. Their total cholesterol levels before also after the diet.
what does it mean to say there is error in our regression?we calculated it wrongthere were data entry errors.we can not
If the suspect was selected from a group of suspects of which only 5% have ever committed a crime, and the serum indicated that is guilty what the probability that he is innocent?
if the standard deviation for a population as estimated from a sample is s 5.6 then the standard error for a sample
A survey of 600 non-fatal accidents showed that 251 involved the use of a cell phone. Find a point estimate for p, the population proportion of accidents that involved the use of a cell phone.
The average age of the students in the sample was 23 with a standard deviation of 3.5: a) Formulate the hypotheses for this problem.
What would that evaluation be and what is the margin of error?
information regarding the price of a roll of camera film 35 mm 24 exposure for anbspsamplenbspof 12 cities worldwide is
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