Question

The data below indicate the contamination in parts per million in each of 50 samples of drinking water at a specific location. hw1_q6.csv

a) What is the first quartile of the data?

b)What is the third quartile of the data?

c)What is the median of the data?

d)What is the mean of the data? Give your answer to three decimal places

e)Values that are greater than Q3 + 1.5 IQR or less than Q1 - 1.5 IQR are typically considered outliers. What value is an outlier in this data? f)Delete the outlier by clicking inside its cell and hitting the Delete key. What is the median after the outlier is deleted? g)What is the mean after the outlier is deleted? Give your answer to three decimal places.

contamination
418
396
400
404
398
413
411
403
410
393
384
415
421
391
398
408
384
396
410
388
406
407
422
422
2321
415
388
426
394
415
411
410
396
426
422
404
414
410
410
401
392
396
415
409
384
426
402
396
392
406

Answer 1

Data in ascending order: 384, 384, 384, 388, 388, 391, 392, 392, 393, 394, 396, 396, 396, 396, 396, 398, 398, 400, 401, 402, 403, 404, 404, 406, 406, 407, 408, 409, 410, 410, 410, 410, 410, 411, 411, 413, 414, 415, 415, 415, 415, 418, 421, 422, 422, 422, 426, 426, 426, 2321