Mathematics, 06.11.2019 22:31 astigall6360

Aset of data with a mean of 45 and a standard deviation of 8.3 is normally distributed. find the value that is –2 standard deviations away from the mean.

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Answer from: Osmin

28.4

Step-by-step explanation:

Given : A set of data with a mean of $\mu= 45$ and a standard deviation of $\sigma=8.3$ is normally distributed.

Now, the value that is –2 standard deviations away from the mean is given by :-

$x=\mu-2\sigma\\\\\Rightrrrow\ x=45-2(8.3)\\\\\Rightarrow\ x=45-16.6\\\\\Rightrrrow\ x=28.4$

Hence, the value that is –2 standard deviations away from the mean. = 28.4

Answer from: Quest

ratios represent a pattern or relationship that can be scaled.

equivalent ratios are pairs of ratios that represent the same relationship between quantities, and can be generated by multiplying or dividing both quantities in the ratio by the same factor.

in this lesson, students will use double number lines and ratio reasoning to solve ratio problems. by partitioning double number lines into proportionate intervals, students will build an understanding of equivalent ratio relationships as those that are generated by multiplying or dividing two related quantities by the same number. this lesson will build upon students' prior understanding of multiplicative comparisons, number line reasoning and equivalent fractions (while highlighting the difference between equivalent fractions and equivalent ratios); and will build toward future work in this unit on building ratio tables, and work in future grades in proportionality, scaling, and expressing and graphing linear functions.

step-by-step explanation:

ratios represent a pattern or relationship that can be scaled.

equivalent ratios are pairs of ratios that represent the same relationship between quantities, and can be generated by multiplying or dividing both quantities in the ratio by the same factor.

Answer from: Quest

step-by-step explanation:

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Aset of data with a mean of 45 and a standard deviation of 8.3 is normally distributed. find the val...

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