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Physical Sciences In 2013 there were 1087 supernovae reported by various observation posts around the world. When possible, these exploding stars were classified by their light curves and absorption lines. A random sample of these Type I and Type II supernovae were obtained, and the magnitude of each was recorded.24
a. Assume the underlying distributions are continuous. Use the Kruskal-Wallis test with a = 0.01 to determine if there is any evidence that the populations are different. Find the p value associated with this test.
b. Use the normal approximation in the Wilcoxon rank-sum test to determine whether there is any evidence to suggest the population median magnitudes are different. Use a = 0.01. Find the p value associated with this test.
c. What is the relationship between the p values in parts (a) and (b)?
d. Consider the value of the test statistics found in parts (a) and (b). Compare z2 and h. How are these values related?
Construct a 95% confidence interval estimate of the difference in proportion of workers who would like to attend a self-improvement course in the recent study and the past study. Show how you obtain your answer.
The following data represent the cost of electricity for the period of July 2008 for a random sample of 50 one-bedroom apartments in a large city.
in may of 2002 the gallup organization asked a random sample of 537 american adults this questionif you could choose
Calculate the actual profit less the expected profit, and classify this difference by source. For the latter, assume that all expense gains are calculated after the gains from the other sources.
Assuming this is literally true, how can it be explained? What facts and/or statistics would you need to know to expose this misleading claim?
Question: Describe pricing strategies that permit firms to extract additional surplus from consumers- including price discrimination, two- part pricing, block pricing, and commodity bundling- and explain the conditions needed for each of these str..
customers come to a barber shop with the frequency of 3 per hour. suppose y4 is the time when the 4th customer has
the data show systolic and diastolic blood pressure of certain people. find the regression equation letting the first
It would like to be within plus or minus $55 of the true mean with a 95% confidence level. The standard deviation is thought to be $700. How many card holders should be sampled?
Kim starts to walk 3 mi to school at 7:30 a.m. with a temperature of 0 degrees F. Her brother Bryan starts at 7:45 a.m. on his bicycle, traveling 10 mph faster than Kim.
The average income of a country is known to be £10,000 with standard deviation £2,500. A sample of 40 individuals is taken and their average income calculated.
Using the Hypothesis Tests Two Sample file and a .05 significance level, test whether there is a difference in the mean salary for men versus women.
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