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State the independent and dependent variables

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Some researchers claim that herbal supplements such as ginseng or ginkgo biloba enhance human memory.  To test this claim, a researcher selects a sample of n = 25 college students.  Each student is given a ginkgo biloba supplement daily for six weeks and then all the participants are given a standardized memory test.  Scores on the test are normally distributed with μ = 70 and σ = 15.  The sample of n = 25 students had a mean score of M = 75.  Is this sample sufficient to conclude that the herb has a significant effect on memory?  Use a two-tailed test with α = .05.

  1. State the Independent and Dependent Variables
  2. State the Null Hypothesis in words and symbols.

b State the alternative Hypothesis in words and symbols.

  1. Compute the appropriate statistic.
  2. What is the decision (Retain or Reject)
  3. State the full conclusion in words

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Reference no: EM132479650

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