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Unformatted text preview: New Mexico during the month of May last year. Electricit cost frequency $80100 3 100120 8 120140 12 140160 16 160180 d normal curve from z = 2 to z = 2 = 0.95 0 7 180200 4 Total= 50 a. Estimate the mean cost. b. Estimate the standard deviation. c. Use the Empirical Rule to estimate e the proportion of costs within two standard deviations of the mean. What are these limits?...
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This note was uploaded on 05/10/2011 for the course STATS 202 taught by Professor Emil during the Spring '11 term at Aberystwyth University.
 Spring '11
 Emil

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