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  3. a random sample of 130 observations produced a mea

A random sample of 130 observations produced a mean of ????=36.1x¯=36.1 from a population with a...

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Basic Math

A random sample of 130 observations produced a mean of????=36.1x¯=36.1 from a population with a normal distribution and astandard deviation ?=4.87.

(a) Find a 95% confidence interval for ?
? ? ?

(b) Find a 99% confidence interval for ?
? ? ?

(c) Find a 90% confidence interval for ?
? ? ?

Answer & Explanation Solved by verified expert
4.2 Ratings (602 Votes)
Solution Given thataSample size n 130Z2 196Margin of error E Z2n 196 487 130 08At 95    See Answer
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