A sample​ mean, sample​ size, population standard​ deviation, and confidence level are provided. x=30​, n=26​, σ=6​, confidence level=90​% a. Use the​ one-mean z-interval procedure to find a...



A sample​ mean, sample​ size, population standard​ deviation, and confidence level are provided.



x=30​,

n=26​,

σ=6​,

confidence level=90​%




a. Use the​ one-mean z-interval procedure to find a confidence interval for the mean of the population from which the sample was drawn.


The confidence interval is from 28 to 31.9.

​(Type integers or decimals rounded to one decimal place as​ needed.)



b. Obtain the margin of error by taking half the length of the confidence interval.


What is the length of the confidence​ interval?


_____________

​(Type an integer or decimal rounded to one decimal place as​ needed.)




Jun 01, 2022
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