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natulia [17]
2 years ago
9

Biologists are keeping track of the different kinds of fish in Lake Michigan. Identify the type of data.

Mathematics
2 answers:
Darya [45]2 years ago
5 0

D. categorical data is your answer :)

arlik [135]2 years ago
3 0

Solution:

O k, to answer this question , let us suppose that there are 75 kinds of fishes found in Lake Michigan,each being approximately 1 million in number.

So, the types of fishes suppose are , A, B,C.AB,A BB, A BBB,.....we will differentiate them according to their Quality,but their number are in million, which we can call numerical data or  Quantitative data.

We can't give the fishes in lake as discrete value, as it does not take certain random values.

As, the data set is about different kind of fishes, which is being categorised for their study.

So we will call this data as (D) Categorical data.

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pav-90 [236]
<h2>Steps:</h2>

So firstly, since we know that the coefficient of x² is 1, this means that this is our base equation:

y = x² + bx + c

Now, since we know that the roots are -7 and 1, set y = 0 and set x = -7 and 1 and simplify:

0=(-7)^2+b(-7)+c\\0=49-7b+c\\-49=-7b+c\\\\0=1^2+b(1)+c\\0=1+b+c\\-1=b+c\\\\-49=-7b+c\\-1=b+c

Now with this, we can set up a system of equations to solve for b and c. For this, I will be using the elimination method. For this, subtract the 2 equations:

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Now that the c variable has been eliminated we can solve for b. For this, divide both sides by -8 and your first part of your answer is b = 6.

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gayaneshka [121]

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Nominal scale is the one which takes categories as its values like gender of a person.

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Ordered scale is one which not only produces the order of variables but also makes the difference between variables known along with information on the value of true zero.

Therefore, the variable which is under consideration here is the ages of children, which takes the values 3,4,5,6 and 7 is a ratio scale.


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