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Example of Hypothesis Test 1: Two-Tail Test

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Uploaded by on May 4, 2011

Statistics: A professor of a large math class uses sampling to determine whether grades are curved or now. Curving occurs if the mean of the grading distribution is not 75. A random sample of 225 grades has mean 70 and standard deviation s = 20. Set up the corresponding hypothesis test and interpret the result.

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Uploader Comments (MathDoctorBob)

  • Looks like you are holding a cop's nightstick or something lol. Nice video though, helped me understand a lot better than from my crappy textbook.

  • @FBIRoyLindell Thanks! I downgraded to a regular pointer. - Bob 

  • great video, statistics test today, and hopefully this will push me over the top to get that A! Just having to remember the dumb steps in the critical value and p value approach.

  • @spartant22 Thanks! Good luck on your exam.  -Bob

  • Thankyou, I find your videos very helpful.

  • @zxr250chris You're welcome, and thanks for the support! - Bob

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  • Excellent:)

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