The weights of pumpkins (in pounds) of 6 pumpkins...

The weights of pumpkins (in pounds) of 6 pumpkins are 5,7,7.5,8,8.5, and 8.75. The weights of the sample have a mean of x¯=7.458

 and a standard deviation of s=1.364.

1) What is the degrees of freedom?

2) What is the critical value when the significance level is α=0.1?

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3) What is the margin of error?

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4) What is the 90% t-confidence interval for pumpkin weights?

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