A data set of 10 points has sample mean value of 14 and a standard deviation of 0.75 , what is the range of the data for a confidence level P=90% ? Given: N=10 Average =14 Standard Deviation =0.75 P=90% Minimum value =? Given: N=10 Average =14 Standard Deviation =0.75 P=90% Maximum value =?
Added by Renee R.
Step 1
Since we are looking for a 90% confidence interval, we need to find the z-value that corresponds to the 5% in each tail (100% - 90% = 10%, so 10% / 2 = 5% in each tail). Using a standard normal distribution table or calculator, we find that the z-value for a 90% Show more…
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