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navik [9.2K]
2 years ago
7

What is eight increased by five? a. 12 b. 13 c. 14 d. 15

Mathematics
1 answer:
Ainat [17]2 years ago
3 0
The answer is B.13.
kjjjjj
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Scores of an IQ test have a​ bell-shaped distribution with a mean of 100 and a standard deviation of 19. Use the empirical rule
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Answer: About 99.7%  IQ scores falls within 43 and 157.

Step-by-step explanation:

According to the empirical rule , if a data follows normal distribution then about 99.7% of the population lies with in three standard deviations from mean.

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