Question
In: Math
A researcher surveyed 50 local households and found they had their TV’s on an average of...
A researcher surveyed 50 local households and found they had their TV’s on an average of 47.3 hours in a week. Assume the time Americans have their TV’s turned on is normally distributed with a standard deviation of 6.2 hours.
Construct a 95% confidence interval estimate for the mean time Americans have their TVs turned on in a week.
Show your work for full credit.
Solutions
Expert Solution
We have given that,
Sample mean =47.3 hours
Population standard deviation=6.2 hours
Sample size=50
Level of significance =1-0.95=0.05
Z critical value (by using Z table)=1.96
Confidence interval formula is
=(45.58 , 49.02)
milcah answered 2 hours agoRelated Solutions
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