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lawyer [7]
3 years ago
14

The scores of eighth-grade students in a math test are normally distributed with a mean of 57.5 and a standard deviation of 6.5.

From this data, we can conclude that 68% of the students received scores between and .
Mathematics
2 answers:
Anna11 [10]3 years ago
8 0
Approximately 68% of a normal distribution lies within one standard deviation of the mean, so this corresponds to students with scores between (57.5 - 6.5, 57.5 + 6.5) = (51, 64)
Kaylis [27]3 years ago
5 0

As given, the scores of eighth-grade students in a math test are normally distributed with a mean of 57.5 and a standard deviation of 6.5.

This means that around 68% of the distributed data lies within the ranges of -6.5 to +6.5 of the given standard deviation.

This implies to:

57.5-6.5=51 and 57.5+6.5=64

So, the range of scores lies between (51,64)

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Step-by-step explanation:

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so

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3 years ago
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kiruha [24]

Answer:

Calculate the Macaulay duration of Annuity B at the time of purchase is 1.369.

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After rearranging the equation, we get 1.07v^{2} + 0.07v - 0.93=0

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7 0
3 years ago
If five times the smaller of two numbers is subtracted from twice the larger the result is 16 if the larger is increased by thre
Rudiy27

Answer:

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Step-by-step explanation:

Let the smaller number be "x" and the larger number be "y"

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8 0
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MakcuM [25]

Answer:

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