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If n=12, ¯x (x-bar)=34, and s=19, construct a confidence interval at a 90% confidence level. Assume the data came from a normally distributed population.Give your answers to one decimal place. < μ <

If n=12, ¯x (x-bar)=34, and s=19, construct a confidence interval at a 90% confidence-example-1
User Doug Ayers
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n=12

s=19

X=34

ConfLevel=90%

A confidence level of 90%

represent a Z statistical of 1.645

the Confidence interval is given by


X\pm Z*(s)/(√(n))

then


34\pm1.645*(19)/(√(12))
34\pm9.02254

then the interval is


25.0\leq u\leq43.0

User Rafael Moreira
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