Total number of bulbs produced=5000
total number of samples=120
number of defective=3
Probability that a bulb selected at random is defective will be:
3/120=0.025
The total number of bulbs that could be defective out of 5000 bulbs produced will be:
5000(0.025)=125 bulbs
Find the area of the top ( circle) then multiply by the height.
Area = pi x r^2
Area = pi x 7^2
Area = 49pi
Volume = 49pi x 15
Volume = 735pi cubic cm.
Answer:
The coronary heart disease specific mortality rate/density of participants in this cohort
= 13.57%
Step-by-step explanation:
a) Data and Calculations:
Total participants in the cohort = 7,000 persons
Total person-years contributed = 56,232
Death during follow-up = 1,890
Number of death due to coronary heart disease = 950
Mortality rate/density of participants in this cohort
= 950/7,000 * 100 = 13.57%
b) The result suggests that 13.57% of the 7,000 participants died during follow-up out of coronary heart disease. This number represents about 50% (950/1,890 * 100) of all deaths recorded during follow-up.
