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Air pollution in large U.S. cities is monitored to see whether it conforms to requirements set by the Environmental Protection Agency. The following data, expressed as an air pollution index, give the air quality of a city for 10 randomly selected days.
57.3 58.1 58.7 66.7 58.6 61.9 59.0 64.4 62.6 64.9
Assuming that the data may be looked upon as a random sample from a normal population, construct a 95% con?dence interval for the actual average air pollution index for this city and interpret.
routine physical examinations are conducted annually as part of a health service program for the employees. it was
An auditor reviewed 25 oral surgery insurance claims from a particular surgical office, determining that the mean out-of-pocket patient billing above the reimbursed amount was $275.66 with a standard deviation of $78.11.
In this the anniversary of the sinking of the Titanic, it is interesting to look at the distribution of those who survived, and those who died. The table below describes the number of men, women and children who were passengers on the Titanic.
Identify the threats to internal validity of the design and explain how such threats could influence the conclusions the study made.
Calculate the horizontal component of the initial velocity of the shell.
an article in ad hoc networks discussed an underwater acoustic sensor network to monitor a given area in an ocean. the
These are objective questions discuss about normal curve. The first question is about the difference between left half and right half of a curve and the second question is about the 5th percentile in a standard normal curve
A cut-off time is set at the slowest 10% of the learning distribution. Anyone slower than this cut-off time is definitely not hired. What proportion of the candidates will be hired automatically?
Calculate the appropriate disease frequency rate. Show your work. The cumulative incidence rate in a population of 100,000 people where 9 new cases of disease were reported within 1 year.
A foreman for a firm admits that on 10% of his shifts he forgets to shut off the machine. This causes the machine to overheat and the probability that a defective mold will be produced during the early morning run increases from 2% to 20%.
1. find the critical value. assume that the test is twotailed and that n denotes the number of pairs of data. n 30 a
you have to use matlabor just explain the steps to calculate these problems and submit it with your answersuppose that
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