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Statistics

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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

  • Statistics -

    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 -

    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

  • Statistics -

    Problem 3?

  • Statistics -

    Exercise set 5 answers:
    4c51a450.linkbucks

    Note: add dotcom after the word linkbucks

    you're welcome

  • Statistics -

    Thanks, Walter DE

  • Statistics -

    @walter de u link doesn't work

  • Statistics -

    what's the answer?

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

  • Statistics -

    prob 1 - the model is good

  • Statistics -

    what's the answer?

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

  • Statistics -

    Problem 5
    Degrees of freedom = _______.

  • Statistics -

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

  • Statistics -

    thanks

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