At 95% confidence, what is the margin of error? A simple random sample of 50 items rom a population with . σ =6 resulted in a sample mean of 32.
Added by Tina C.
Step 1
To find the critical value, we need to look up the z-score for a 95% confidence level. Since we have a large sample size (n > 30), we can use the standard normal distribution. The z-score for a 95% confidence level is 1.96. Show more…
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