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. |
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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