ST512 Lab 5 key

# ST512 Lab 5 key - ST512 Laboratory Assignment 5 KEY 1 In...

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Page 1 of 3 ST512 Laboratory Assignment 5 KEY 1. In the table below, fill in the average heights, the standard error of the average heights, and the sample sizes for each voice. Voice Average height Std. Error n Alto 64.9 in 0.5 35 Bass 70.7 0.4 39 Tenor 69.2 0.7 20 Soprano 64.3 0.3 36 2. Using the side-by-side boxplots, determine whether the data appear to satisfy the assumptions of ANOVA. A one-way ANOVA seems reasonable. There seems to be a little bit of skew in the heights of the sopranos, but there is no other evidence of strong skew or outliers in these data. (One might also observe that boxplots are not ideal for assessing normality.) 3. Interpret (in everyday language, not statistical jargon) the outcome of the hypothesis test conducted by the one-way ANOVA. There is very strong evidence that the average singer heights for each voice are not all the same. 4. Interpret (in everyday language, not statistical jargon) the outcome of the hypothesis test that compares the height of male singers to the height of female singers.

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ST512 Lab 5 key - ST512 Laboratory Assignment 5 KEY 1 In...

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