Children living near a smelter in Texas were exposed to lead, and their IQ scores were subsequently measured. The following histogram was constructed from those IQ scores.

Figure 3.11

a. Estimate the frequency for each of the six score categories.

b. Estimate the total number of children included in the histogram.

c. What are the lowest and highest possible IQ scores included in the histogram?

d. How does the shape of the histogram change if relative frequencies are used instead of frequencies

Pulse Rates of Females. In Exercises, refer to the following frequency table of pulse rates of a sample of females.

Transcribed Image Text:

Frequency 40 30 20 10 0 IQ Scores of Sample of Children Exposed to Lead 40 60 80 100 120 140 160 IQ score