(a) Make a stemplot with feet as the stems and 10ths of feet as the leaves.
There are 2 outliers, one in each direction. These won’t change x much but will increase the standard deviation s. (Hint: See pages 226–229.)
(b) Give a 90% confidence interval for the mean length of all great white sharks.
(The interval may be too wide due to the influence of the outliers on s.) (Hint:
See pages 469–471.)
(c) What do we need to know about these sharks in order to interpret your result in (b)? (Hint: See pages 469–470.)
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