Question: A study has a sample mean of 35, and a sample size of 49.The population standard deviation deviation is known to be 6.What is the

A study has a sample mean of 35, and a sample size of 49.The population standard deviation deviation is known to be 6.What is the 90%confidence interval?

a.(34.80, 35.20)

b.(33.59, 36.41)

c.(47.30, 50.70)

d.(33.56, 36.44)

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