11.6 The following table shows how many days in December a sample of 6 students were present at their university and the
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b) = 6
11.6 The following table shows how many days in December a sample of 6 students were present at their university and the number of lectures each attended on a given day. Number of days present Number of lectures attended x y 283079 12 13 10 32541 10 3 (a) Find the equation of the least squares line which will enable us to predict y in terms of x. (b) Use the result in part (a) to estimate how many lec- tures someone who has been present for 15 days can be expected to attend each day. 11.7 With reference to the preceding exercise, test the null hypothesis = 0.75 against the alternative hypothesis ß < 0.75 at the 0.10 level of significance.