STATS 200-The frequency distribution below shows the distribution

Subject: Mathematics    / Statistics
Question
IQ Scores
Frequency    Cumulative Frequency
50-69    23
70-80    249
90-109        0.722
110-129

130-149
25
Total
1000

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.)

(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 of at least 110?

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

70 – 89, 90 – 109, or 110 – 129? Why?