The U.S. Census Bureau conducts a study to determine the time needed to complete the short form. The Bureau surveys 400 people. The sample mean is 8.8 minutes. There is a known standard deviation of 2.13 minutes. The population distribution is assumed to be normal. Find the 94% confidence interval. all answers to the nearest hundredth. (a) = (b) s = (c) σ = (d) n = Enter DNE if this is unknown. Enter DNE if this is unknown. (e) Critical Value ? ✓ = (f) Find the 94% confidence interval and complete the sentence below. Conclusion: We estimate with complete the short form is between % confidence that the mean time in minutes to and minutes.

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