SOLUTION: The heights are measured for supermodels Niki Taylor, Nadia Avermann, Claudia Schiffer, Elle MacPherson, Christy Turlington, Bridget Hall, Kate Moss, Valeria Mazza, and Kristy Hume

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Question 1131503: The heights are measured for supermodels Niki Taylor, Nadia Avermann, Claudia Schiffer, Elle MacPherson, Christy Turlington, Bridget Hall, Kate Moss, Valeria Mazza, and Kristy Hume. These nine models have a mean of 70.2 inches and a standard deviation of 1.5 inches. With a 0.01 level of significance, test the claim that supermodels have heights with a mean that is greater than 63.6 in (average height for all women).What is
A) The null and alternative Hypothesis?
B)The test statistic?
Answer by Boreal(15235) (Show Source):
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Ho: mean height is less than or equal to 63.6 inches
Ha: mean height is greater than 63.6 inches (one way test)
test statistic is a t df=8, 0.995
calculation will be t*s/sqrt(n) and if that is greater than the critical value of the t, then reject Ho