A random sample of 9 Ontario men gave a mean foot size of 5.8 inches. The foot size of Ontario men is normally distributed with a standard deviation of 1.4 inches. Estimate 88% confidence interval for the mean foot size of Ontario men.     ( 5.07 , 6.53 )     ( 5.25 , 6.35 )     ( 4.99 , 6.61 )     ( 5.21 , 6.39 )

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A random sample of 9 Ontario men gave a mean foot size of 5.8 inches. The foot size of Ontario men is normally distributed with a standard deviation of 1.4 inches. Estimate 88% confidence interval for the mean foot size of Ontario men.
   
( 5.07 , 6.53 )
   
( 5.25 , 6.35 )
   
( 4.99 , 6.61 )
   
( 5.21 , 6.39 )
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