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In evaluating a poll, a larger sample size would be considered more favorably, but what consideration would you consider even important than the sample size before trusting the validity of a poll?
Analyze and support whether you believe that the changes recommended are statistically valid and sound enough to make practice changes in a hospital for the two papers listed below. Also in your answer please touch on the following items
Care was taken to operate a metal casting process so that no assignable causes in variation were introduced, and randomly selected castings were weighed.
What is the probability that 30 or more paid by credit? d. What is the probability that less than 12 paid by credit? e. What is the probability that 12 to 30 paid by credit?
The data are in the file Pollution. Determine whether the three pollution-control methods will produce equal results.
suppose that the hypotheses h0p.35 and hapgt.35 are to be tested. calculate the ovserved z-statistic for the sample
What would be my null hypothesis? Alternative hypothesis?
They would like the margin of error of the 95% confidence interval for the proportion to be 0.05 or less. Use the guessed value p = 0.25 to find the required sample size.
A marriage counselor is interested in the proportion of clients she counsels who stay married.
statistician asked a group of 60 employees how many hours they have worked overtime during the last two weeks
The results are n = 65 and r = 0.37. Is there statistical evidence of a linear correlation between the two variables?
assume that a simple random sample has been selected from a normally distributed population and test the given claim.
A Pew Research study regarding cell phones asked questions about cell phone experience. One growing concern is unsolicited advertising in the form of text.
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