In a survey, 19 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a mean of $44 and standard deviation of $5. Construct a confidence interval at a 98% confidence level.
Give your answers to one decimal place.
Question 3
If $n=25$, $\bar{x}=50$, and $s=10$, find the margin of error at a 95% confidence level
Give your answer to two decimal places.
Question 4
Express the confidence interval (422.2, 676) in the form of $\bar{x} \pm ME$.