Scenario : An elementary school teacher is concerned about her 2nd graders readi

Question

Scenario: An elementary school teacher is concerned about her 2nd graders reading test scores as compared to other scores of schools around the state. The teacher is trying to determine whether or not her school's average scores are significantly lower than the surrounding schools average scores. The average score of the surrounding schools 2nd grade reading scores is an 80.

If we use a type I error value of 0.05, is the average reading score in this years 4th graders statistically significantly different from the national average? Is there enough information to determine this?

Calculate the size of the difference between the national score and the current students average score.

Explanation / Answer

No there is not enough information to determine this. To run the test either we need population standard deviation , national average score and sample size (in case of z test) or sample standard deviation , national average score and sample size (in case of t test).

To Calculate the size of the difference between the national score and the current students average score we need average national score.

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