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There are many ways to measure the reading ability of children Research designed to improve...

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There are many ways to measure the reading ability of children Research designed to improve reading performance is dependent on good measures of the outcome One frequently used test is the DRP or Degree of Reading Power A researcher suspects that the mean score u of all third graders in Henrico County Schools is different from the national mean which is 32 To test her suspicion she administers the DRP to an SRS of 28 Henrico County third grade students The mean DRP score for this group of students is 35 09 with a standard deviation of 11 19 An inspection of the data shows no skewness or serious departures from normality a Construct a 90 confidence interval for the mean DRP score for all Henrico County third graders b Use the confidence interval you constructed in a to comment on whether you agree with the researcher s claim Explain your reasoning clearly

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