Question: 16.14 Bootstrap comparison of average reading abilities. Table 7.4 (page 452) gives the scores on a test of reading ability for two groups of third-grade

16.14 Bootstrap comparison of average reading abilities. Table 7.4

(page 452) gives the scores on a test of reading ability for two groups of third-grade students. The treatment group used “directed reading activities,” and the control group followed the same curriculum without the activities.

(a) Bootstrap the difference in means x1 − x2 and report the bootstrap standard error.

(b) Inspect the bootstrap distribution. Is a bootstrap t confidence interval appropriate? If so, give a 95% confidence interval.

(c) Compare the bootstrap results with the two-sample t confidence interval reported on page 455.

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