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.

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Chapter1: Combinatorial Analysis
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Question 8
In a survey, 29 people were asked how much they spent on their child's last birthday gift. The resul
were roughly bell-shaped with a mean of $49 and standard deviation of $6. Construct a
interval at a 80% confidence level.
Fonfidence
Give your answers to one decimal place.
Interpret your confidence interval in the context of this problem.
Question Help: DPost to forum
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Transcribed Image Text:Question 8 In a survey, 29 people were asked how much they spent on their child's last birthday gift. The resul were roughly bell-shaped with a mean of $49 and standard deviation of $6. Construct a interval at a 80% confidence level. Fonfidence Give your answers to one decimal place. Interpret your confidence interval in the context of this problem. Question Help: DPost to forum Submit Question
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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 X¯ 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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