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Mashcka [7]
3 years ago
7

Ms. Harris is comparing test scores in four of her classes. The results are listed below. Class 1 Class 2 Class 3 Class 4 Mean S

core: 86.5 Median Score: 84 St. Deviation: 4.56 Mean Score: 79.8 Median Score: 76 St. Deviation: 3.23 Mean Score: 78.5 Median Score: 84 St. Deviation: 7.8 Mean Score: 65.2 Median Score: 61 St. Deviation: 5.67 In which of her classes did most students have the widest range of scores?
Advanced Placement (AP)
1 answer:
Vilka [71]3 years ago
8 0

Answer: Class 3

Explanation:

Standard Deviation is a measure of dispersion which means that it measures how far apart the values in the dataset are from the mean.

If the values in the dataset are close together, the standard deviation will be smaller. The reverse is true.

The class with the widest range is there the class with the highest Standard Deviation.

With a SD of 7.8, Class 3 has the widest range of scores.

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Helppp quick pointsss
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Answer:

1) The angle would be 150 degrees

a) coordinates would be ( -\frac{\sqrt{3}}{2}, \frac{1}{2} )

b) Trigonometric ratios:

sin:  \frac{1}{2}

cos: -\frac{\sqrt{3}}{2}

tan: -\frac{\sqrt{3}}{3}

csc: 2,  

sec: -\frac{2\sqrt{3}}{3}

cot: \sqrt{3}

Explanation:

\frac{17\pi }{6} simplifys to \frac{5\pi }{6} which has a reference angle of \frac{\pi }{6}. We can take the coordinates of \frac{\pi }{6} and make the x value negative to find the correct coordiantes. Then, using those coordinates, plug the into the trigonomic equations.

For example, sin in opposite/hypotenuse. So sin = 1/2 divided by 1. Then you can find the rest of the equations that way.

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tan= sin/cos

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cot= cos/sin

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