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aleksandr82 [10.1K]

3 years ago

13

PLEASE HELP !!! WILL MARK BRAINLIEST

1 answer:

True [87]3 years ago

6 0

Answer:

Group A.

Step-by-step explanation:

As shown by the dot plots, Group A has one 9-year-old painter, seven 10-year-old painters, and 24 painters between the ages of 15 and 20. Group B has seventeen painters between the ages of 10 and 20 and thirteen painters between the ages of 25 and 30. Since mean is the average of everything, Group A most likely has a lower mean age of painting students than Group B does.

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As I was going to St. Ives

cluponka [151]

Answer:

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Step-by-step explanation:

7 times 7 times 7 times 7 is 2401

4 0

3 years ago

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Alik [6]

Answer:

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Real Answer:

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3 0

3 years ago

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pashok25 [27]

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8 0

3 years ago

pH measurements of a chemical solutions have mean 6.8 with standard deviation 0.02. Assuming all pH measurements of this solutio

aalyn [17]

Answer: 2.14 %

Step-by-step explanation:

Given : pH measurements of a chemical solutions have

Mean : $\mu=6.8$

Standard deviation : $\sigma=0.02$

Let X be the pH reading of a randomly selected customer chemical solution.

We assume pH measurements of this solution have a nearly symmetric/bell-curve distribution (i.e. normal distribution).

The z-score for the normal distribution is given by :-

$z=\dfrac{x-\mu}{\sigma}$

For x = 6.74

$z=\dfrac{6.74-6.8}{0.02}=-3$

For x = 6.76

$z=\dfrac{6.76-6.8}{0.02}=-2$

The p-value = $P(6.74$

$P(z$

In percent, $0.0214\times=2.14\%$

Hence, the percent of pH measurements reading below 6.74 OR above 6.76 = 2.14%

6 0

3 years ago

4x + 2y =10<br><br> 4x -2y = -10<br> perpednicular or paralell

Alina [70]

Answer:

the answer is perpendicular I think :)

6 0

3 years ago