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Frequency table with frequency and cumulative relative

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Reference no: EM131494003

The frequency distribution below shows the distribution for IQ scores for a random sample of 1000 adults. (Show all work. Just the answer, without supporting work, will receive no credit.)

IQ Scores   frequency cumulative relative frequency

50 - 69 23

70 - 89 249

90 -109 .74

110 - 129

130 - 149     25

Total           1000

(a) Complete the frequency table with frequency and cumulative relative frequency. Express the cumulative relative frequency to three decimal places.

(b) What percentage of the adults in this sample has an IQ score between 90 and 129, inclusive?

(c) Which of the following IQ score groups does the median of this distribution belong to?

70 - 89, 90 - 109, or 110 - 129? Why?

Reference no: EM131494003

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