Question

Summary statistics for paired data are given. n d = 35 x ¯ d = 61...

Summary statistics for paired data are given.

n d = 35 x ¯ d = 61 s d = 9.4


Use the sample information and the t-distribution to find a 95% confidence interval for the mean difference μ d . Assume the underlying distribution is approximately normal.

Round your answers to three decimal places.

The 95% confidence interval is =

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Answer #1

We have here for given example,                  
                  
Sample mean for difference=61  
Sample standard deviation for difference=9.4  
Sample size=35  
Degree of freedom =n-1=34  
                  
Level of significance =0.05      
                  
t critical value (by using t table) =2.032      
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