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n a survey, 26 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a mean of $39.3 and standard deviation of $19.7. Estimate how much a typical parent would spend on their child's birthday gift (use a 80% confidence level). Give your answers to 3 decimal places. Express your answer in the format of ¯xx¯ ±±  Error.

n a survey, 26 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a mean of $39.3 and standard deviation of $19.7. Estimate how much a typical parent would spend on their child's birthday gift (use a 80% confidence level). Give your answers to 3 decimal places. Express your answer in the format of ¯xx¯ ±±  Error.

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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In a survey, 26 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a mean of $39.3 and standard deviation of $19.7. Estimate how much a typical parent would spend on their child's birthday gift (use a 80% confidence level). Give your answers to 3 decimal places.

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

Expert Solution
Step 1

Solution-:

Given: \bar{x}=3.3, n=26,s=19.7,\alpha=0.20

We find C,I, in the format (\bar{x} \pm Error)

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