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Over [174]
3 years ago
12

Consider the normal distribution curve. A graph shows the horizontal axis numbered 50 to 78. There is no vertical axis. Variance

= 7. A line shows an upward trend from below 50 to 64 and a downward trend from 64 to Over 78. The space beyond 78 is labeled x. Which statements are true about the curve? Check all that apply. The standard deviation of the data is 64. The variance of the data is 49. The median is 64. The data point 75 is less than one standard deviation from the mean. The data point 50 is two standard deviations away from the mean.
Mathematics
2 answers:
nikdorinn [45]3 years ago
5 0

Answer:

The variance of the data is 49.

The median is 64.

The data point 50 is two standard deviations away from the mean.

Step-by-step explanation:

Took it on EDGE. Hope you pass!

harkovskaia [24]3 years ago
4 0

Answer:

The variance of the data is 49.

The median is 64.

The data point 50 is two standard deviations away from the mean.

Step-by-step explanation:

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3 years ago
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galina1969 [7]

The arc length of the semicircle is 5π units

<h3>Calculating length of an arc</h3>

From the question, we are to calculate the arc length of the semicircle

Arc length of a semicircle = 1/2 the circumference of the circle

∴ Arc length of a semicircle = 1/2 × 2πr

Arc length of a semicircle = πr

Where r is the radius

From the given information,

r = 5

∴ Arc length of the semicircle = 5 × π

Arc length of the semicircle = 5π units

Hence, the arc length of the semicircle is 5π units

Learn more on Calculating length of an arc here: brainly.com/question/16552139

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8 0
2 years ago
The brain volumes ?( cm cubed cm3?) of 20 brains have a mean of 1083.9 1083.9 cm cubed cm3 and a standard deviation of 122.2 122
Colt1911 [192]

Answer:

Range: (844.9,1333.7)

A brain volume of 1348.3 cm cubed can be considered significantly high.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 1083.9 cm cubed

Standard Deviation, σ = 122.2 cm cubed

Range rule thumb:

  • This rule state that the the range of data is four times the standard deviation of the data.

\text{Range} = 4\times \sigma = 4\times 122.2 = 488.8

Upper Limit:

\mu + 2\sigma = 1089.3 + 2(122.2) = 1333.7

Lower limit:

\mu - 2\sigma = 1089.3 - 2(122.2) = 844.9

Since, 1348.3 does not lie in the range (844.9,1333.7),  a brain volume of 1348.3 cm cubed can be considered significantly high.

6 0
3 years ago
13(6x – 5) – x = 13 – 2(x + 1
elena-s [515]

Answer:

Step-by-step explanation:

13(6x-5)-x=13-2(x+1)\\78x-65-x=13-2x-2\\77x-65=11-2x\\77x+2x=11+65\\x=76/79\\x=0.9620

6 0
3 years ago
Please help 20 points⁉️⁉️⁉️⁉️⁉️⁉️⁉️⁉️⁉️⁉️
xz_007 [3.2K]

Answer:

BC equals 5

Step-by-step explanation:

they are parallel to each other making them equal sides

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3 years ago
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