In a survey, 29 people were asked how much they spent on their child's last birthday gift. The resu were roughly bell-shaped with a mean of $49 and standard deviation of $6. Construct a çonfidenc interval at a 80% confidence level. Give your answers to one decimal place. 土 Interpret your confidence interval in the context of this problem.
In a survey, 29 people were asked how much they spent on their child's last birthday gift. The resu were roughly bell-shaped with a mean of $49 and standard deviation of $6. Construct a çonfidenc interval at a 80% confidence level. Give your answers to one decimal place. 土 Interpret your confidence interval in the context of this problem.
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.3: Measures Of Spread
Problem 26PFA
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In a survey , 29 people were asked how much they spent on their child’s birthday gift . The result were roughly bell-shaped with a mean of $49 and standard deviation of $6 .
The provided sample mean is and the sample standard deviation is . The size of the sample is and the required confidence level is 80%.
At 80% C.I. , The number of degrees of freedom are , and the significance level is .
Based on the provided information, the critical t-value for and degrees of freedom is .
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