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Let's assume our class represents a normal population with a known mean of 90 and population...

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Statistics

Let's assume our class represents a normal population with aknown mean of 90 and population standard deviation 2. There are 100students in the class.

a. Construct the 95% confidence interval for the populationmean.

b. Interpret what this means.

c. A few students have come in. Now we cannot assume normalityand we don't know the population standard deviation. Let the samplemean = 90 and sample standard deviation = 3. Let's make the samplesize 20. We can assume alpha to be .05. Construct the 95%confidence interval assuming this new information.

Answer & Explanation Solved by verified expert
3.8 Ratings (688 Votes)
Solution Given thata Point estimate sample mean 90Population standard deviation 2Sample size n 100At 95 confidence level 1 95 1 095    See Answer
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