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Here are the IQ test score of 31 seventh grade girls of a schools district. 114, 100, 104,89,102,91,114,114,103,105,108,130,120,132,111,128,118,119,86,72,111,103,74,112,107,103,98,96,113,112,93 A) what's the mean and standard deviation?

Here are the IQ test score of 31 seventh grade girls of a schools district.

114, 100, 104,89,102,91,114,114,103,105,108,130,120,132,111,128,118,119,86,72,111,103,74,112,107,103,98,96,113,112,93

A) what's the mean and standard deviation?

B) what's the 95% confidence interval?

C) can we trust the confidence interval?

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