A type of rice, which is resistant to an herbicide was crossed with another type

Question

A type of rice, which is resistant to an herbicide was crossed with another type of rice, which is susceptible to the herbicide. It is supposed that their offspring will have a 1: 2: 1 ratio measuring the number of plants that are resistant moderately resistant and susceptible to the herbicide. A crop of 3120 was comprised of 772 resistant, 1611 moderately resistant and 737 susceptible plants. The null hypotheses for this chi-square goodness-of-fit test is A. H_0: Pr = 1/4 and Pm = 2/4 = 1/2 and Ps = 1/4 B. H_0: Pr = 1 and Pm = 2 and Ps = 1 C. H_0: The distribution of the proportions is not uniform D. H_0: The distribution of the proportions is uniform: Pr = Pm = Ps Refer to question number 5: The alternative hypothesis is A. H_a: The distribution of the proportions is not uniform B. H_a: the proportions are not al the same C. H_a: Pr notequalto Pm notequalto Ps D. H_a: The distribution specified by H_0 is not true Refer to question number 5: The expected count of rice that is to the herbicide is A. 1560 B. 184.25. C. 737. D. 780. Refer to question number 5: The contribution to the chi-square statistic for the rice that is susceptible is to the herbicide is about A. 2.51 B. 0.055. C. 0.893. D. 2.371. Refer to question number 5: The degrees of freedom are ______ Refer to question number 5: The Chi-Square test statistic is ________ (give your answer to two decimal places.)

Explanation / Answer

Queston 5:

H0:p1=p2=p3

proportionare same

OPTION D

Question6:

proportions are not uniform

OPTIONA

Question7:

total ratio=1+2+1=4

susceptible to herbicide=1/4*3120=780

OPTION D

Question8

OptionD

2.371

Question9

Df=n-1=3-1=2

Question10

chi sq stat=4.12

O E O-E (O-E)^2 (O-E)^2/E resistant 772 780 -8 64 0.082051 moderately resistant 1611 1560 51 2601 1.667308 susceptibe 737 780 -43 1849 2.370513 CHI SQ TESTSTAT 4.119872

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