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garri49 [273]
3 years ago
12

Please help, timed! Will mark brainliest!!

Mathematics
1 answer:
True [87]3 years ago
3 0

Answer:

The answer would be b!

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Let x and s present the sample mean and sample standard deviation, respectively. Is it possible that around 70% of data lie with
tensa zangetsu [6.8K]

Using the Chebyshev's Theorem and the Empirical Rule, it is found that it is not possible that around 70% of data lie within x-2s and x+2s.

-------------------------

  • Distributions are classified as symmetric or not symmetric.
  • If the distribution is not symmetric, Chebyshev's Theorem is used, which states that <u>at least 75% of the measures are within 2 standard deviations of the mean</u>.
  • If the distribution is symmetric, the Empirical Rule is used, which states that <u>around 95% of the measures are within 2 standard deviations of the mean</u>.

Thus, from the above bullet points, at least 75% of the measures are within x-2s and x+2s, which means that the percentage of 70% is too small.

A similar problem is given at brainly.com/question/23612895

8 0
3 years ago
A transmission is designed to last 16 years, with a standard deviation of 1.2 years. What is the probability that a transmission
stich3 [128]

Answer:

<em>First option 5%</em>

Step-by-step explanation:

<u>Normal Distribution</u>

Gauss Distribution is one of the most widely-used continuous probability distribution to characterize random events. The curve of the function is called the bell curve.  

The standard Normal Distribution is a special case where the mean \mu=0 and the standard deviation \sigma=1. The values of the cumulative normal distribution cannot be computed by simple calculations, we must use tables of digital implementations integrated with tools like Excel or any online resource.

The entry for standard normal distribution is a parameter called the z-score, computed like shown below

\displaystyle z=\frac{X-\mu}{\sigma}

The values provided in our problem are

X=14,\ \mu=16,\ \sigma=1.2

Computing z results

\displaystyle z=\frac{14-16}{1.2}=-1.667

By using any of the aforementioned resources, we compute the left-tail probability

P(z=-1.667)=0.048\approx 5\%

We choose the first option 5%

3 0
3 years ago
HELPP ME PLEASE I NEED HELP
timofeeve [1]

Answer:

See below.

Step-by-step explanation:

The equation is this

A= 1/2bh

We plug in the equation and we get this

A= 1/2 (14)(24)

Let's do the math.

A= 1/2 (336)

A= 168

That's your answer. ✌️

I hope this helps!

3 0
2 years ago
Jason drove 125 miles without stopping . His average speed was 50 miles per hour . How many hours did Jason drive
GalinKa [24]

Answer:

2/5=0.4h

Step-by-step explanation:

Use V=X/t

t=X/V

=50/125=2/5=0.4h

4 0
3 years ago
Read 2 more answers
Select the undefined term that best defines the arrow pictured
rodikova [14]
What is the slope of the line through the point A(-3,4) and B(2,-1)
Best answer
A -1
B 1
C -3
D - 1/3
8 0
3 years ago
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