Answer:
The sample proportion represents a statistically significant difference from 50%
Explanation:
The sample proportion is the same as 50%
Alternate hypothesis: The sample proportion is not the same as 50%
z = (p' - p) ÷ sqrt[p(1 - p) ÷ n]
p' is sample proportion = 289/400 = 0.7225
p is population proportion = 50% = 0.5
n is number of students sampled = 400
z = (0.7225 - 0.5) ÷ sqrt[0.5(1 - 0.5) ÷ 400] = 0.2225 ÷ 0.025 = 8.9
The test is a two-tailed test. Using a 0.01 significance level, critical value is 2.576. The region of no rejection of the null hypothesis is -2.576 and 2.576.
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This is the complete sentence using Spanish vocabulary terms:
Hoy Eduardo decoró la iglesia con <u>flores</u> para celebrar la <u>vida</u> de su mejor amiga, Alicia, que ha muerto. Eduardo y Alicia se conocieron a los dos años de edad.
The ceremony described is: un velorio.
<h3>What are indefinite articles?</h3>
In this exercise, you have to complete the sentences with the correct Spanish vocabulary and then name the ceremony described using the correct indefinite article.
Indefinite articles (''un'', ''una'', ''unos'' and ''unas'') have the same gender and number as the noun they modify. In this case, <em>un</em> velorio.
I was able to find the complete exercise online.
Check more information about indefinite articles here brainly.com/question/13246665
A flatworm has a simple nervous system with two nerve cords running down both of its sides. It also has two simple brains, and two eyespots that help sense light. While a fish's nervous system is comprised of a central brain and a spinal cord along with many branching nerves, which allows them to sense things around them.
Explanation:
A flatworm has a very mild nervous system with pair nerve cords moving down each side. It has two single brains called ganglia, which are pure packages of nerves. It has two eyespots that support it sense light. A flatworm has a gastrovascular hole with one opening.
Fish have extremely advanced nervous systems organized around a brain. Fish brains have rare clearly visible parts. Back to the brain is the spinal cord, which is the deep dorsal nerve cord that identifies chordates.