A survey of several 9 to 11 year olds recorded the following amounts spent on a trip to the mall:$19.26, $21.87, $15.83, $20.57, $19.31, $24.74, $22.82Construct the 95% confidence interval for the average amount spent by 9 to 11 year olds on a trip to the mall. Assume the population is approximately normal.Copy DaStep 3 of 4: Find the critical value that should be used in constructing the confidence interval. Round your answer to three decimal places.

Given information:The data values are as follow: 19.2621.8715.8320.5719.3124.7422.82Sample size (n)…

Answered: A survey of several 9 to 11 year olds…

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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A survey of several 9 to 11 year olds recorded the following amounts spent on a trip to the mall: $19.26, $21.87, $15.83, $20.57, $19.31, $24.74, $22.82 Construct the 95% confidence interval for the average amount spent by 9 to 11 year olds on a trip to the mall. Assume the population is approximately normal. Copy Step 2 of 4: Calculate the sample standard deviation for the given sample data. Round your answer to two decimal places.
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create a 90% confidence interval for the following data: x = 25 n = 100

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