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
We do not do your homework for you. Although it might take more effort to do the work on your own, you will profit more from your effort. We will be happy to evaluate your work though.

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
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