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One hundred subjects in a psychological study had a mean of 35 on a test instrument designed to measure anger. The study the ó=10. Find a 99% confidence interval for the mean anger score of the population.

  • stats. -

    99% = mean ± 2.575 SEm

    SEm = SD/√n

  • stats. -

    so 2.575=10/what would n be?

  • stats. -

    The probability that Luis will pass his statistics test is 0.94. Find the probability that he will fail his statistics test.

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