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Alisiya [41]
3 years ago
13

A biologist wonders if the life span of bats will be affected by two new food sources from invasive species moving into an area.

To conduct the experiment, the biologist needs three treatment groups: a group where the diet will not include invasive species (control), a group where the diet will include one invasive species (treatment group 1), and another group where the diet will include the other invasive species (treatment group 2). The biologist chooses the first cloud-free night and catches the first 18 bats that fly out of a cave, placing them into three equal groups of six bats. To decide the treatment for each group, the biologist places three slips of paper labeled control, treatment group 1, and treatment group 2 in a hat and randomly selects 2 slips of paper. The first piece of paper gives the treatment for the first group, the second piece of paper gives the treatment for the second group, and the remaining treatment is given to the third group.
Which component is missing from the biologist’s process?

a.The biologist did not use proper labeling on the pieces of paper.
b.The biologist did not use the appropriate number of treatment groups.
c.The biologist did not randomly assign the individual bats to the treatment groups.
d,The biologist did not randomly choose the weather on the night for bat capture.
Mathematics
2 answers:
lesya [120]3 years ago
4 0

Answer:

B) The biologist did not randomly assign the bats to the treatment groups.

Step-by-step explanation:

Answer for edge

elena-s [515]3 years ago
3 0

Answer:

D

Step-by-step explanation:

Every factor, besides for the factor you are testing for, must be the same for all of the groups and must be randomly selected. Choosing bats from one clear night isn’t random because a cloud free night might effect which bats first fly out of the cave.

It’s like surveying the first few people who walk out of a movie theater and asking if they thought the movie was good. Most likely not because they left so early/quickly. This can skew the results from being completely random and won’t reflect the entire population as a whole accurately.

Also, note that for every other answer choice, they are correct.

A - The biologist did use proper labeling

B - There are enough treatment groups

C - He did randomly assign 6 for each group

Therefore, by process of elimination, it is D.

I hope this helps! :)

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xeze [42]
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our x is still not by itself so in order to get it by itself we need to get rid of that 13

we need that x is being divided by 13 so in order to get rid a divided value we have to do the opposite to both sides - multiply by 13 on each side!

x/13 x 13 = x
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6 0
3 years ago
If two supplementaryangles are in the ratio 2:3, find the angles.
kramer
The angles are 72 degrees and 108 degrees.

Explanation:

Angle 1 : Angle 2 = 2 : 3
Angle 1 = 2k
Angle 2 = 3k

Angle 1 + Angle 2 = 180 (supplementary angles)
2k + 3k = 180
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5 0
2 years ago
The difference between city hall and the post office is 6 1/2 miles ( six and one half)city hall is 1 1/3 (one and one fourth NO
Norma-Jean [14]
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city hall to library site = 1 1/4 miles  = represented by d
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d + e = f

1 1/4 + e = 6 1/2

find e.
e = 6 1/2 - 1 1/4
e = 13/2 - 5/4
e = (13*2)/(2*2)  - 5/4
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e = (26-5)/4
e = 21/4
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To check:
d + e = f

1 1/4 + e = 6 1/2
1 1/4 + 5 1/4 = 6 1/2
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6 0
3 years ago
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SpyIntel [72]
3 - 1 = 2
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4 0
3 years ago
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Answer:

Just read the step by step

Step-by-step explanation:

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7 0
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