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kumpel [21]
4 years ago
8

Describe three different ways animals get food

Mathematics
2 answers:
Montano1993 [528]4 years ago
6 0
1) They are carnivores and hunt for food.
2) They are herbivores and eat plants.
3) Some (like the ant) make food by farming.
jeyben [28]4 years ago
3 0
(1) Animals must expend energy to get food, they must actively obtain food from the environment.

(2) <span>Clams use their valves to get food.

(3) </span>Cats, tigers and lions use their claws in getting food.<span> </span>
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Answer:

b. 0.6592 and 0.7044

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence interval 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the zscore that has a pvalue of 1 - \frac{\alpha}{2}.

For this problem, we have that:

A survey of an urban university showed that 750 of 1,100 students sampled attended a home football game during the season. This means that n = 1100, p = \frac{750}{1100} = 0.6818

90% confidence interval

So \alpha = 0.1, z is the value of Z that has a pvalue of 1 - \frac{0.1}{2} = 0.95, so Z = 1.645.

The lower limit of this interval is:

\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.6818 - 1.645\sqrt{\frac{0.6818*0.3182}{1100}} = 0.6592

The upper limit of this interval is:

\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.6818 + 1.645\sqrt{\frac{0.6818*0.3182}{1100}} = 0.7044

So the correct answer is:

b. 0.6592 and 0.7044

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