A 90% confidence interval for µ is found to be (10, 14.4). The sample size used for this task is 50. Determine the sample average and the sample standard deviation.
Added by Nerea Z.
Step 1
4 and x̄ - margin of error = 10, we can find x̄ by adding these two equations: x̄ + margin of error = 14.4 x̄ - margin of error = 10 Adding the two equations: 2x̄ = 24.4 x̄ = 24.4 / 2 x̄ = 12.2 Show more…
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