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At Rachel’s 21th birthday party, 16 girls were timed to see how long (in seconds) they...

At Rachel’s 21th birthday party, 16 girls were timed to see how long (in seconds) they could hold their breath in a relaxed position. After a two-minute rest, they timed themselves while jumping. The sample mean and variance of the difference between their jumping and relaxed times is -3.2 (Jumping minus relaxed) and 9.2342 .The girls thought that the mean difference between their jumping and relaxed times would be zero. Perform a 94 % confidence interval and use the statistical process without graphing the data nor the assumptions.

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