Statistics

posted by Me

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 chi-square 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

1. PsyDAG

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.

2. Anonymous

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 chi-square statistic is closest to
2.5

Problem 5
Degrees of freedom = 3.

Problem 6
Based on this test, does the model look good?
Yes

3. Anonymous

Problem 3?

4. WalterDe

you're welcome

5. Help

Thanks, Walter DE

6. Anonymous

@walter de u link doesn't work

7. stat

Under the null, the expected number of plants in Category D is ______.

8. Cod

prob 1 - the model is good

9. Anonymous

Under the null, the expected number of plants in Category D is ______.

10. Anonymous

Problem 5
Degrees of freedom = _______.

11. Anonymous

Problem 3, under null is 25 number of plants in Category D.

12. stat

thanks

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