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SpyIntel [72]
4 years ago
5

A sample data set with a mean of 685 and a standard deviation of 39.8 has a bell-shaped distribution. what range of values inclu

de approximately 68% of the data?
a. between 645.2 and 724.8
b. between 605.4 and 764.6
c. between 565.6 and 804.4
d. between 656.2 and 703.8
Mathematics
1 answer:
harkovskaia [24]4 years ago
3 0
The correct choice is A) between 645.2 and 724.8.

According to the empirical rule, 68% of data will fall within 1 standard deviation from the mean.  This means it will be either 39.8 lower than the mean or 39.8 higher than the mean:
685-39.8 = 645.2
685+39.8 = 724.8
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How can you write the expression 7(b – 2) in words?
m_a_m_a [10]

Solution:

Let's verify each option to see which is correct.

<u>Option A</u>

Two subtracted from the quotient of seven divided by b.

  • => 7/b - 2 = 7(b - 2)                                                                [False]

<u>Option B</u>

Seven added to difference of b minus two.

  • => 7 + (b - 2) = 7(b - 2)                                                           [False]

<u>Option C</u>

The quotient of seven divided by b minus two.

  • => 7/b - 2 = 7(b - 2)                                                               [False]

<u>Option D</u>

Two subtracted from seven times b

  • => 7b - 2 = 7(b - 2)                                                                [False]

<u>Option E</u>

The product of seven and the difference of b minus two

  • => 7 x (b - 2) = 7(b - 2) = 7(b - 2)                                           [True]

Option E is correct.

3 0
3 years ago
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The sum of 3 fifteens and four twos
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How is it written on you paper sweetie? is it 15+15+15+4+4?
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4x-(-7x+4.3)-1.6=x<br> does anyone know the answer to this
ipn [44]

Step-by-step explanation:

4x-(-7x+4.3)-1.6=x

4x+7x-4.3-1.6=x

11x-x=5.9

x=5.9/10=0.59 is your answer

5 0
3 years ago
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Marrrta [24]
Let's not think about the problem, let's think about the fractions and dividing. We're are trying to find how many sets of 3/44 are in 3 3/4. We need to divide. Using keep change and flip, we can divide successfully.
Let's make sure the first fraction is improper.
15/4÷3/44=?
Keep, Change, and Flip.
15/4×44/3
660/12
Let's simplify.
55.
So Nicole can play 55 rounds.
7 0
3 years ago
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Answer:

Step 2

Step-by-step explanation:

Mario made a mistake in Step 2 when substracting \frac{1}{3} from \frac{4}{3}. When substracting his result ended up being \frac{2}{3} but it is actually....

\frac{4}{3} - \frac{1}{3} = \frac{4-1}{3} = \frac{3}{3} = 1

so the right answer is q = 1

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