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Verizon [17]
3 years ago
11

According to the empirical rule, if the data form a "bell-shaped curve" (normal distribution), approximately what percent of the

observations will be contained within + /- 2 standard deviations from the arithmetic mean. (Select the correct answer from the choices below.)A. 99.7B. 95.0C. 75.0D. 68.3
Mathematics
1 answer:
Ann [662]3 years ago
3 0

Answer: B. 95.0

Step-by-step explanation:

In statistics , the famous empirical rule says that " if the data is normally distributed then 68% of the observations will be contained within \pm1 standard deviations from the arithmetic mean, 95% of the observations will be contained within \pm2 standard deviations from the arithmetic mean and 99.7% of the observations will be contained within \pm3 standard deviations from the arithmetic mean".

Hence, B is the correct answer.

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Your teacher was really kind to give you the equation.

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3 years ago
What is the y-intercept, axis of symmetry and vertex of the following function.
pshichka [43]
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2 years ago
Let sets A and B be defined as follows.
VashaNatasha [74]
<h3>Given</h3>

  • Set A: A = {-26, -25, -24, -23, - 22, - 21}
  • Set B: B ∈ {x: x is even, x ≥ 6 and x ≤ 20}

<h3>(a) </h3>

<em />

<em>Cardinality means the number of elements in the set.</em>

Cardinality of the set A:

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Set B has even numbers between 6 and 20, both included:

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Then its cardinality is:

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<h3>(b) </h3>

To solve this we need to compare the elements of sets A or B with numbers given:

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  • 6 ∈ B, True          ⇒  6 is listed as element of B
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5 0
2 years ago
Find the product of 51 and -2.5.
yaroslaw [1]
The answer is C because 51×-2=-102 and 51×-0.5=-25.5

So it -102+(-25.5) or C
6 0
3 years ago
Read 2 more answers
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