In which of the following situations can a confidence interval provide useful information for making a decision?
A)To assess whether or not at least 90% of a company's financial entries are correct.
B)To estimate the percentage of married couples in which the wife is taller than the husband.
C)To help determine whether or not someone has ESP (versus just being a lucky guesser).
D)All of the above.

Question

Quizplus · Accepted Answer

Confidence intervals can provide useful information in all the given situations by estimating the range within which the true parameter (e.g., percentage or proportion) lies with a certain level of confidence. This can help in making decisions based on statistical evidence regarding the accuracy of financial entries, the proportion of married couples with taller wives, or the existence of ESP.

In Which of the Following Situations Can a Confidence Interval