Answer to Question #188845 in Statistics and Probability for Alice

Question #188845

Stephen has found that the average weight packed gummy candies selected from a normally distributed population is 200g with standard deviation of 8g. Find the point and interval estimates of all gummy candies using 99% confidence level.


1
Expert's answer
2021-05-07T11:43:41-0400

"\\bar{x}=200g, \\sigma=8g\\\\\n\n\\alpha=0.01,\\\\\n\nz_{\\frac{\\alpha}{2}}=z_{0.025}=1.96"


Confidence interval"= \\bar{x}\\pm z_{0.025}\\times \\sigma"

"=200\\pm 1.96\\times 8\\\\=(200\\pm 15.68)\\\\=(184.32,215.68)"


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