Question: Difference in proportion who use text messaging, using p t = 0.87 with n = 800 for teens and p a = 0.72 with n

Difference in proportion who use text messaging, using p̂_t = 0.87 with n = 800 for teens and p̂_a = 0.72 with n = 2252 for adults.

Find a 95% confidence interval for the difference in proportions two ways, using StatKey or other technology and percentiles from a bootstrap distribution and using the normal distribution and the formula for standard error. Compare the results.

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