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Summarize this data set with a frequency distribution

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1. The average reading speed of students completing a speed-reading course is 450 words per minute (wpm). If the standard deviation is 70 wpm, ?nd the z score associated with each of the following reading speeds.

a. 320 wpm      c. 420 wpm
b. 475 wpm      d. 610 wpm

2. The following data values are 2009 per capita

a. Summarize this data set with a frequency distribution. Construct the corresponding histogram.

b. Use the histogram in Part (a) to ?nd approximate values of the following percentiles:

i. 50th      iv. 90th
ii. 70th     v. 40th
iii. 10th

Reference no: EM131008629

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