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guapka [62]
3 years ago
5

Can you help me with the top one I don’t understand it

Mathematics
2 answers:
Dafna11 [192]3 years ago
4 0

Answer:

the answer is 1 : 5

Step-by-step explanation:

out of 25 of them 5 are sick which in a fraction is 1/5

san4es73 [151]3 years ago
4 0

Answer:   24:5 is the ratio

Step-by-step explanation:

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Assume that the weights of spawning Chinook salmon in the Columbia river are normally distributed. You randomly catch and weigh
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Answer: The point estimate for the mean weight of all spawning Chinook salmon in the Columbia River is the mean weight from your sample (\overline{x}) = 31.2 pounds .

Step-by-step explanation:

The weights of spawning Chinook salmon in the Columbia river are normally distributed.

Given :  The mean weight from your sample is 31.2 pounds with a standard deviation of 4.4 pounds.

The point estimate for the mean (\mu) weight of all spawning Chinook salmon in the Columbia River is the mean weight from your sample (\overline{x}) i.e. is 31.2 pounds because the best point estimate for population mean is the sample mean. [in normal distribution]

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3 years ago
a researcher sets out to measure drug use on US college campuses by asking a representative sample of undergraduates whether the
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Based on the information given, it can be noted that the problem with the research is the problem of validity.

<h3>Problems with validity.</h3>

It should be noted that in a research, a problem with validity takes place when there's a lack of reliability of the independent variable.

Also, it is a result of lack of representativeness of the independent variable and a lack of impact of the independent variable.

In this case, the researcher sets out to measure drug use on US college campuses by asking a representative sample of undergraduates whether they are currently receiving federal grants or loans. It should be noted that the question asked doesn't relate to the research.

In conclusion, there's a problem with validity.

Learn more about researches on:

brainly.com/question/25257437

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Step-by-step explanation:

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