math80.sample quiz 2 - H a : not so Expected Frequencies...

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wostner : worksheet : mendel experiment ©2007-2009 ulf wostner <wostner@cyberprof.com> Mendel's TheoryGregory Mendel [1822-1884], the father of genetics In a famous experiment, Mendel studied four types of peas: RY = " round yellow peas" RG = " round green peas" WY = " wrinkled yellow peas" WG = " wrinkled green peas" His genetic theory predicted these proportions: RY : RG : WY : WG = 9 : 3 : 3 : 1 His experiment yielded these frequencies: RY = 315, RG = 108, WY = 101, and WG = 31. Set up the Hypotheses H 0 : RY : RG : WY : WG = 9 : 3 : 3 : 1
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Unformatted text preview: H a : not so Expected Frequencies and the 2 test-statistic Phenotyp e Observed Frequencies Expected Frequencies O-E (O-E) 2 E RY RG 0.1490 WY WG Totals: 555 555 0.6565 Look up the Critical Point Find the critical value using our default of = 5%. Graph the Rejection Region Conclusion We REJECT ACCEPT H We REJECT ACCEPT H a Discussion: Was the fit "too good to be true" ?Consider these table values, from a left-tail 2 table: 2 3,0.95 = 0.352 2 3,0.90 = 0.584 2 3,0.05 = 7.815...
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This note was uploaded on 04/01/2009 for the course MATH 80 taught by Professor Wostner during the Spring '09 term at City College of San Francisco.

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