Conduct a hypothesis test showing all of your steps. A community center claims that the chlorine level in its pool has a standard deviation of 0.48 parts per million (ppm). Samples were taken 27 times over the past month that yielded a standard deviation of 0.61ppm. Test the center’s claim with a 5% level of significance. a) State the hypotheses and label the claim. b) Is it left-tailed, right-tailed, or two-tailed? c) What are the critical values? Draw a picture. d) What is the test-statistic?
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Conduct a hypothesis test showing all of your steps.
A community center claims that the chlorine level in its pool has a standard deviation of 0.48 parts per million (ppm). Samples were taken 27 times over the past month that yielded a standard deviation of 0.61ppm. Test the center’s claim with a 5% level of significance.
a) State the hypotheses and label the claim. b) Is it left-tailed, right-tailed, or two-tailed?
c) What are the critical values? Draw a picture. d) What is the test-statistic?
e) Give one reason for your decision to reject/not reject H0 based on: Test statistic compared to critical value(s). State the conclusion, relating it back to the original claim.
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