mandilynn22

21.06.2020 • 

Mathematics

Formulate the indicated conclusion in nontechnical terms. Be sure to address the original claim. An entomologist writes an article in a scientific journal which claims that fewer than 3 in ten thousand male fireflies are unable to produce light due to a genetic mutation. Assuming that a hypothesis test of the claim has been conducted and that the conclusion is to reject the null hypothesis, state the conclusion in nontechnical terms.
A. There is not sufficient evidence to support the claim that the true proportion is less than 3 in ten thousand.
B There is not sufficient evidence to support the claim that the true proportion is greater than 3 in ten thousand.
C. There is sufficient evidence to support the claim that the true proportion is less than 3 in ten thousand.
D. There is sufficient evidence to support the claim that the true proportion is greater than 3 in ten thousand.

Ответ:

Shadowhawk681

29.01.2022

Mathematics

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C. There is sufficient evidence to support the claim that the true proportion is less than 3 in ten thousand.

Step-by-step explanation:

The claim of the researcher is that fewer than 3 in ten thousand male fireflies are unable to produce light due to a genetic mutation.

Then, the conclusion of the hypothesis test is to reject the null hypothesis. The null hypothesis stated the opposite of the researchers claim: that 3 or more in ten thousand male fireflies are unable to produce light due to a genetic mutation.

This means that the the researcher now has statistical evidence to support his claim.

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Ответ:

tasphipps

11.11.2020

Mathematics

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ED=7.5

Step-by-step explanation:

ΔABC is similar to ΔDEB (they share ∠B, and ∠C=∠D and ∠A=∠E because corresponding angles), so their sides are in ratio:

ED/AC=BD/BC

We can see that BC is twice BD (marked), so we know BD/BC=0.5

ED/AC=BD/BC

ED/15=0.5

ED=7.5

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