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The U-Haul trailer pictured is estimated to hold an average of 15,625  pounds with a stdev =...

The U-Haul trailer pictured is estimated to hold an average of 15,625  pounds with a stdev = 2,236 pounds.  At a 90% level, find the confidence interval for a sample of 36of these trailers. You must use the proper format for confidence intervals;  round to 2 decimal places.
Math   Statistics-And-Probability   
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Answer #1

Let X be the weight of U-Haul trailer.

Given

n=36

s=2236

The 90% confidence interval for the true population mean weight of U-Haul trailer is

. By using t table t0.05,35=1.69

Hence 90% confidence interval is

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