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Wasserman and wadsworth 1989 discuss a process for the manufacture of steel bolts that continuously feed an assembly line downstream. Historically, the thickness of these bolts follow a normal distribution with a mean of 10.0 mm and a standard deviation of 1.6 mm. Process supervision becomes concerned about the process if the thickness begin to get larger than 10.8 mm or smaller than 9.2 mm. Assume that the current process mean is 10.0 mm, and consider a randomly selected bolt.
a. Find the probability that the thickness of this bolt is between 9.2 and 10.8 mm.
b. Find the probablility that the thickness of this bolt is smaller thn 9.2mm
Peter, Paul, Mary, John and Martha are members of the pastoral council at a localchurch. They are to be seated at one side of a long conference table in a pastoral councilmeeting.
10 cartons are taken at random from an automatic filling machine.The mean net weight of the carton is11.8 kg and standard deviation of 0.15kg. Does the sample mean differ significantly from the intended weight of 12kgs?
What would be a good example of a null and alternative hypotheses for a decision relevant in life? What Type I and Type II errors could occur with your decision-making process?
What will be the predicted satisfaction score for a patient with a pain relief score of 62 and what is the standard error of estimate when predicting satisfaction from knowledge of pain relief score?
How many social robots would need to be sampled in order to estimate the proportion ofrobots designed with legs, no wheels to within .075 of its true value with 99%confidence
1.an srs of 20 third grade children is selected in chicago and each is given a test to measure their reading ability.
A Federal funding program is available to low income neighborhoods. To qualify for the funding a neighborhood must have a mean household income of less then $15,000 per year.
At = .05, does the Atlanta sample support the conclusion that above-average rates exist for this private water system? Can you conclude that above-average rates exist for this private water system?
the u.s. bureau of labor statistics produces consumer price indexes for several different categories. shown here are
In general, when the dependent variable is neither interval nor ratio in level of measurement -- i.e., is not numeric -- a nonparametric statistical test is required to test the null hypothesis.
Calculate numerical summaries including measures of central tendency such as mean and median and measures of variation including range and standard deviation.
if the random variable z is the standard normal score and a gt 0 is it true that pz lt -a pz gt a? why or why not?
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