L. Use the data from the David County science competition supplied in Exercise 2

Question

L. Use the data from the David County science competition supplied in Exercise 2.10. Construct a bar graph that shows e county-wide population percentage of students at each school. 2 Histograms, Frequency Polygons, and Time Series Graphs 2. Sixty-five randomly selected car salespersons were asked the number of cars they generally sell in one week. Fourteen ople answered that they generally sell three cars; nineteen generally sell four cars; twelve generally sell five cars; nine nerally sell six cars; eleven generally sell seven cars. Complete the table. Data Value (# cars) | Frequency | Relative Frequency | Cumulative Relative Frequency Table 2.42 13. What does the frequency column in Table 2.42 sum to? Why? 14. What does the relative frequency column in Table 2.42 sum to? Why? 15. What is the difference between relative frequency and frequency for each data value in Table 2.42?

Explanation / Answer

The relative frequency is obtained by dividing the frequency by total frequency.

The cummulative frequency is obtained by summing all the previous and current relative frequency

Data Values(# Cars) Frequency Relative frequency Cummulative Frequency 3 14 =14/65=0.215384615 0.215384615 4 19 =19/65=0.292307692 0.507692308 5 12 =12/65=0.184615385 0.692307692 6 9 =9/65=0.138461538 0.830769231 7 11 =11/65=0.169230769 1

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