Question: The accompanying table and the data file Dow Jones show percentage changes (xi) in the Dow Jones index over the first five trading days of

The accompanying table and the data file Dow Jones show percentage changes (xi) in the Dow Jones index over the first five trading days of each of 13 years and also the corresponding percentage changes (yi) in the index over the whole year.

a. Calculate the sample correlation.
b. Test, at the 10% significance level against a two-sided alternative, the null hypothesis that the population correlation is 0.

390332 644571 x5 111 v4 9 903 5218263 x1 0 0 2 2 1 1

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