Scenario 2 The Castaic Lake reservoir provides water for the norther portion of

Question

Scenario 2 The Castaic Lake reservoir provides water for the norther portion of the Greater Los Angeles Area. A random sample of days during Summer 2013 was obtained and the capacity of the lake on each day (in thousands of acre feet) was measured. The historic mean capacity during the summer is 277 thousand acre feet. The JMP output was analyzed and submitted by Tracey, a statistics student. What feedback (if any) would you give to Tracey on the work submitted? ? Summary Statistics ? Confidence Intervals Test Mean Mean 274.85545 Std Dev 7.7855371 Parameter Estimate Lower Cl Upper Cl 1-Alpha Hypothesized Value277 274.855 Actual Estimate DF Std Dev 2748555 269.6251 280.0858 Mean Std Dev 7.785537 5.439887 13.6631 0.950 0.950 7.78554 t Test Test Statistic -0.9136 Prob >It 03824 Prob > t Prob

Explanation / Answer

Feedback: Historic mean capacity during summer is still 277 thousand acre feet. So as of now no need to increase the capacity of the resorvior.

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