Scores on a mathematics assessment test for eighth-graders have a mean of 283, a 10th percentile of 232, a 25th percentile of 255, a 75th percentile of 304, and a 90th percentile of 327. Interpret each of these numerical descriptive measures. Interpret the mean value of 283. Choose the correct answer below. A. For this problem, the mean value of 283 represents the variation in the test scores on a mathematics assessment test for eighth-graders. B. For this problem, the mean value of 283 represents the range of test scores on a mathematics assessment test for eighth-graders. C. For this problem, the mean value of 283 represents the average test score on a mathematics assessment test for eighth-graders. D. For this problem, the mean value of 283 represents the middle test score when the scores are arranged in ascending (or descending) order.

C )  For this problem, the mean value of 283 represents the average test score on a mathematics assessment test for eighth-graders.

Step-by-step explanation:

10 th  percentile of 232

10 % below 232 and 90 % above 232

25 th percentile of 255

25 % below 255 and 75 % above 255

75 th percentile of 304

75 % below 304 and 25% above 304

90 th percentile of 327

90 % below 327 and 10 % above 327 .

So counting is from below to above in ascending order .

the mean of 283 represents the average of the test score

Hence option C ) is correct .

explanation:

infrared radiation has wavelength in the range between 700 nm and 1 mm. lets' convert these values into scientific notation, keeping in mind that:

let's start from the lower value, we have:

(we moved the dot two places to the left, so we increased the exponent by 2 units, from -9 to -7)

the higher value is:

so, the range of wavelength of infrared radiation is: