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A researcher predicts that smoking cigarettes decreases a person’s sense of smell. On a test of...

  1. A researcher predicts that smoking cigarettes decreases a person’s sense of smell. On a test of olfactory sensitivity, the m for nonsmokers is 18.4. A sample of 12 people who smoke a pack a day produces a mean of 16.25 and a variance of 4.75.

  1. What are Ho and Ha for this study (in words and symbols)?

  1. Compute tobt. Show your work

  1. What is the tcrit?

  1. What should the researcher conclude about the relationship? Report your findings in the correct format.
  1. Compute the confidence interval for m. Show your work

  1. What does this confidence interval mean?
Math   Statistics-And-Probability   
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A researcher predicts that smoking cigarettes decreases a person's sense of smell. on a test of...
A researcher predicts that smoking cigarettes decreases a person's sense of smell. on a test of olfactory sensitivity, the mew for non-smokers is 18.4. A sample of people who smoke a pack a day produces these scores 16, 14, 19, 17, 16, 18, 17, 15, 18, 19, 12, 14
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