STAT 2040 Lecture Notes - Lecture 5: Type I And Type Ii Errors, Null Hypothesis, Normal Distribution
2 Oct 2017
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J. b. "s strongly suggested exercises: 1, 5, 6, 10, 12, 13, 15, 19, 21, 33, 37, 38, 41, 48, 59, 61, 62, 63, 64, 65, You wish to show that the true mean amount of saturated fat exceeds 4. 0 grams. (d) an auto manufacturer claims that at least 98% of purchasers of one of their top models are satis ed with their purchase. You wish to show that the true percentage is less than 98%. (e) you wish to investigate whether there are di erences in the variances of the gestation periods of three species of mammal. 3 hypothesis tests for when is known. 3. 2 the test statistic: suppose we are interested in testing a null hypothesis about a population mean . This population is normally distributed with a standard deviation of = 5. Calculate the value of the appropriate test statistic in the following situations. (a) n = 10, x = 15. 5, 0 = 20.
