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The New York Times reported that the mean time to download the homepage for the Internal Revenue Service is 0.08 seconds. Suppose that that download time is normally distributed with a standard deviation of 0.2 seconds. What is the probability that a download time is less than 1 second?
Assume a population standard deviation of 350 kilowatt hours. Determine the standard error of the mean. With a 0.95 probability, determine the margin of error or standard error.
What is the mean of this uniform distribution? What is the standard deviation?
The following estimated regression model was developed relating yearly income (Y in $1,000s) of 30 individuals with their age (X 1 ) and their gender (X 2 ) (0 if male and 1 if female).
Test the hypothesis that the average price is higher than $1.87. Use level of significance α = 0.05.
A study of family income is studied through a sample of 500 randomly selected families. The results can be summarized as the mean family income was 41,000 the median income was 29,000.
Find out correlation coefficient r, If student take 35 minutes to complete exam, what is his predicted score.
There are 3 radar stations and the probability of a single radar station detecting an enemy plane is 0.65. What is the probability of 2 stations detecting an enemy plane? Round your answer to nearest hundredth.
Researchers at Pharm-X, a pharmaceutical company, are testing and comparing the effects of Drug A and Drug B on participants' allergies. The researchers are using a double-blind procedure to conduct their test.
Rewrite in the following alternative format with left and right endpoints:Would a given mean value of 79.56 be likely, given the calculated confidence interval?
State the null and alternate hypotheses, the decision rule, find the test statistic, state your decision, and estimate the P value for the following:
Which component of a time series is most likely to occur? Which component has a pattern that must be complete in a single year and repeat from year to year?
With this information, by constructing a 2 by 2 table, compute the predicative value positive and predictive value negative of the ELA in hypothetical population of 1000000 blood donors.
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