In a survey, 30 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a mean of $47.8 and standard deviation of $17.2. Estimate how much...

In a survey, 30 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a mean of $47.8 and standard deviation of $17.2. Estimate how much a typical parent would spend on their child's birthday gift (use a 98% confidence level). Give your answers to 3 decimal places.


Express your answer in the format of ¯xx¯ ±±  E.
$ ±± $