Posted by Me on Saturday, August 17, 2013 at 8:39am.
According to a genetics model, plants of a particular species occur in the categories A, B, C, and D, in the ratio 9:3:3:1. The categories of different plants are mutually independent. At a lab that grows these plants, 218 are in Category A, 69 in Category B, 84 in Category C, and 29 in Category D.
Does the model look good?
Problem 1
The null hypothesis is:
The model is good.
The model isn't good.
Too many of the plants are in Category C.
The proportion of plants in Category A is expected to be 9/16; the difference in the sample is due to chance.
Problem 2
The alternative hypothesis is:
The model is good.
The model isn't good.
Too many of the plants are in Category C.
The proportion of plants in Category A is expected to be 9/16; the difference in the sample is due to chance.
Problem 3
Under the null, the expected number of plants in Category D is ______.
Problem 4
The chisquare statistic is closest to
1
1.5
2
2.5
3
3.5
4
4.5
Problem 5
Degrees of freedom = _______.
Problem 6
Based on this test, does the model look good?
Yes No

Statistics  PsyDAG, Saturday, August 17, 2013 at 12:39pm
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Statistics  Anonymous, Saturday, August 17, 2013 at 12:40pm
Problem 1
The null hypothesis is:
The proportion of plants in Category A is expected to be 9/16; the difference in the sample is due to chance.
Problem 2
The alternative hypothesis is:
The model is good.
Problem 4
The chisquare statistic is closest to
2.5
Problem 5
Degrees of freedom = 3.
Problem 6
Based on this test, does the model look good?
Yes 
Statistics  Anonymous, Sunday, August 18, 2013 at 3:56pm
Problem 3?

Statistics  WalterDe, Sunday, August 18, 2013 at 4:56pm
Exercise set 5 answers:
4c51a450.linkbucks
Note: add dotcom after the word linkbucks
you're welcome 
Statistics  Help, Tuesday, August 20, 2013 at 12:08am
Thanks, Walter DE

Statistics  Anonymous, Wednesday, August 21, 2013 at 2:30am
@walter de u link doesn't work

Statistics  stat, Wednesday, August 21, 2013 at 9:52am
what's the answer?
Under the null, the expected number of plants in Category D is ______. 
Statistics  Cod, Wednesday, August 21, 2013 at 1:51pm
prob 1  the model is good

Statistics  Anonymous, Thursday, August 22, 2013 at 11:38am
what's the answer?
Under the null, the expected number of plants in Category D is ______. 
Statistics  Anonymous, Thursday, August 22, 2013 at 5:27pm
Problem 5
Degrees of freedom = _______. 
Statistics  Anonymous, Friday, August 23, 2013 at 7:07am
Problem 3, under null is 25 number of plants in Category D.

Statistics  stat, Friday, August 23, 2013 at 11:19am
thanks