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lesya692 [45]
3 years ago
10

Hurry PLZ help will get 20 pts

Biology
1 answer:
garri49 [273]3 years ago
5 0

Answer:

it definitely the last one

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Oxbow lakes form when:
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When a bend in a river gets cut off...
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What affect would a decrease in primary consumers have on the a- p- e- x- p- r- e- d- a- t- o- r?
Gekata [30.6K]

Answer: The food chain

Explanation:

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How does water move underground?
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Groundwater is transported through aquifers because of two main reasons: gravity and pressure. In unconfined aquifers, which we concentrate on because they are more likely to be contaminated, water always flows from high points to low points because of gravity.

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Earthworms have a(n) , birds have a(n) , and spiders have a(n) . Endo exo or hydroskeleton these choices are used for all three
dezoksy [38]
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3 years ago
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What is the 95% CI for data set 2?
vesna_86 [32]

Answer: 20 ± 11.32

Explanation: <u>Confidence</u> <u>Interval</u> (CI) is an interval of values where there is a % certainty the true mean value lies in. For example, a 95% CI means there is a 95% certainty the true mean value lies in the interval.

For the data set 2, z-value for 95% confidence interval is z = 1.96

Formula to calculate CI is

x ± z\frac{s}{\sqrt{n} }

where

x is mean

z is z-value

s is standard deviation

n is the sample number

Then:

20 ± 1.96\frac{10}{\sqrt{3} }

20 ± 1.96\frac{10}{1.7320}

20 ± \frac{19.6}{1.7320}

20 ± 11.32

The 95% CI is 20 ± 11.32, which means there is a 95% certainty the true value is between 8.68 and 31.32.

8 0
4 years ago
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