Question: Use the normal distribution to find a confidence interval for a difference in proportions p1 - p2given the relevant sample results. Assume the results come
Use the normal distribution to find a confidence interval for a difference in proportions p1 - p2given the relevant sample results. Assume the results come from random samples.
A90%confidence interval for p1 - p2given counts of148yes out of170sampled for Group1and12yes out110sampled for Group2.
Give the best estimate for p1 - p2, the margin of error, and the confidence interval.
best estimate = ?
margin of error = ?
confidence interval is ? to ?
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