The numbers of hours some trigonometry students spent studying for their first test are described by the density histogram in Fig. 95.

a. Compute the area of each of the six bars in the density histogram.
b. Find the total area of the six bars.
c. Explain why the total area of the bars of any density histogram is always equal to the result you found in part (b).
d. For the second test, the center of the distribution increases by 2 hours and the distribution becomes more spread out. Sketch a density histogram that might describe the study-time distribution for the second test.

Transcribed Image Text:

Time Spent Studying 0.3 0.25 0.2 0.15 0.1 0.05 Hours