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Listed below are measured amounts of lead in the air. The EPA has established an air quality standard for lead of 1.5 mg/m3. The measurements shown below were recorded at a building on different days. Use the given values to construct a 95% confidence interval estimate of the mean amount of lead in the air
5.40 1.10 0.43 0.84 0.71 0.90
What is the confidence interval for the population mean is there anything about this data set suggesting that the confidence interval might not be very good?
a. yes, because the sample mean is greater than 1.5ug/m3
b. yes, because the confidence interval does not contain 1.5ug/m3
c. no, the data appears to be normally distributed
d. yes the value of 5.40 appers to be an outlier
master card and other credit card issuers must by law print the annual percentage rate apr on their monthly statements.
A survey found that 85% of women in a given city enjoy shopping online. Suppose you randomly selected 6 women from the city and ask them whether or not they enjoy shopping online. Find the probability that exactly 4 say they enjoy shopping online.
What are the key terms in a verbal hypothesis that signify whether you are conducting a one-tailed or two-test? Give an example and explain your answer.
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Construct a 95% confidence interval on the population mean for the following sample data set:
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A United Nations report shows the mean family income for Mexican migrants to the U.S.. is $27,000 per year. A FLOC evaluation of a sample 25 Mexican families units reveals a mean to be $30,000 with a sample standard deviation of $10,000.
Perform the indicated test of hypothesis. HO: M 7, given x= 0.01, N=25, Xbar = 7.019 and SD is =.1681. Assume the sample is selected from a normally distributed population.
if a population has a standard deviation ? of 25 units what is the standard error of the mean if samples of size 100
Which study is correct iincome inequality by Michael Thompson or economic context and Americans' perceptions if income inequality
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