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LekaFEV [45]
3 years ago
10

Please I need help and I need more practice one this please

Mathematics
1 answer:
PSYCHO15rus [73]3 years ago
7 0
? = 30 because your number is increasing by -8 how to figure it out is by taking 14 - 6 = 8
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a) (1215, 1297)

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We are given the following information in the question:

Mean, μ = 1256

Standard Deviation, σ = 41

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  • Also known as 68-95-99.7 rule.
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a) range of years centered about the mean in which about 68% of the data lies

\mu \pm 1(\sigma)\\=1256 \pm 41\\=(1215, 1297)

68% of data will be found between 1215 years and 1297 years.

b) range of years centered about the mean in which about 95% of the data lies

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95% of data will be found between 1174 years and 1338 years.

c) range of years centered about the mean in which about all of the data lies

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All of data will be found between 1133 years and 1379 years.

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