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The average temperature during the summer months for the northeastern part of the United States is 68.0°. A sample of 12 cities had an average temperature of 69.6° for the summer of 1995. The standard deviation of the sample is 1.1°. At α = 0.05, can it be concluded that the summer of 1995 was warmer than average? Solve using the Traditional Method.
mean = 69.6
S= 1.1
n= 12
Test the Null hypothesis that µ ≤ 68
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