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1 year ago

Question 3 of 10

1 answer:

7 0

According to the observational study, Option C is the correct answer which represent the The researcher does not control or change the population.

According to the statement

we have to explain all about the observational studies.

So, For this purpose, we know that the

Observational study means a kind of study within which individuals are observed or certain outcomes are measured.

And from the given information:

There are three major sorts of statistical studies: observational studies, surveys, and experiments.

▫ An observational study records the values of variables for members of a sample.

▫ A survey could be a sort of observational study that gathers data by asking people variety of questions.

In Option C we are provided that in a very survey Data are collected a few population which require not be true.

Thus, According to the observational study, Option C is the correct answer which represent the The researcher does not control or change the population.

Learn more about Observational study here

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Conduct the appropriate hypothesis test and compute the test statistic. A company that produces fishing line undergoes random te

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Option D) Yes, because the test statistic is -2.01

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 30 pound

Sample mean, $\bar{x}$ = 29.1 pounds

Sample size, n = 20

Alpha, α = 0.05

Sample standard deviation, s = 2 pounds

First, we design the null and the alternate hypothesis

$H_{0}: \mu = 30\text{ pounds}\\H_A: \mu < 30\text{ pounds}$

We use one-tailed(left) t test to perform this hypothesis.

Formula:

$t_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{\sigma}{\sqrt{n}} }$

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Option D) Yes, because the test statistic is -2.01

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3 years ago

Check all the answers that are more precise than a weight of 200 grams.

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Answer:

amigo mío la respuesta es la letra B

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2 years ago