Calculate degrees of freedom

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Reference no: EM133359856

Question 1. What is the formula used to calculate degrees of freedom? What are the degrees of freedom for a sample size of 25?

Question 2.Suppose the mean score for the critical reading test cited in the previous question is 580. What is the probability that a random sample of 500 students will have a mean score of more than 590?

Question 3.Based upon extensive data from a national high school educational testing program, the standard deviation of national test scores for critical reading was found to be 115 points. If a sample of 500 students are given the test, what would be the standard error of the mean?

Please use excel to calculate your response and label all fields.

Reference no: EM133359856

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