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Boxes of sugar are filled by machine with considerable accuracy. The distribution of box weights is normal and has a mean of 32 ounces with a standard deviation of only 2 ounces. A quality control inspector takes a sample of n=16 boxes and finds the sample contains, on average, M=31 ounces of sugar.
A) If the machine is working properly, what is the probability of obtaining a sample of 16 boxes that averages 31 ounces or less?
B) Should the inspector suspect the filling machine needs repair?
a sample has a mean of 39.5 and a standard deviation of 4.3. in a 2 tail hypothesis test with a.05 this sample would
Find the proportion of working days in which anywhere from 750 to 850 tons is mined. Find the probability that on a given day, the yield will be below 665 tons.
given the returns and probabilities for the three possible states listed here calculate the covariance between the
Find a 95% confidence interval estimate of the population proportion who think that it should be illegal to use a cellular telephone while driving.
Estimates published by the World Health Organization state that one out of every three workers may be toiling away in workplaces that make them sick.
a) Calculate the 90% confidence interval on the estimated sample mean. b) Calculate the 99% confidence interval. Why is this interval larger? c) Explain why this confidence interval would shrink if your sample size was 100 (there are two reasons).
Is it beneficial for nations to become dependent on one another? Discuss the reasons for the increase in Chinese world trade market share.
Determine the truth value of the compound statements.- Lincoln's having written the Gettysburg Address is a sufficient condition for Alexander the Great's having civilized America if and only if Washington's being assassinated is a necessary condi..
Let T and S be two statistics such that S = ?(T ) for a measurable ?. Show that (a) if T is complete, then S is complete;
Suppose that it is a presidential election year and Ohio is one of the 'swing' states. Your polling company wants to conduct a presidential preference poll of the citizens of Ohio to predict which candidate will win the election.
Assume that male snakes of a particular species are all scaled versions of the same basic shape. Describe in words the sort of relationship that you might expect there to be between the volume and the length of a snake. What relationship would you ..
a sample of 77 individuals working at a particular construction site office was selected at random. the noise level dba
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