1. 7 units
2. 11 units
3. (5, -3)
4. (-4, 5)
Answer:
When a product fails to perform as warranted, this is called <u>breach of warranty. </u>
Answer: (0.4247,0.7753)
Step-by-step explanation:
Given : Sample size : n=30
Number of people graduated from a registered welding course =18
The probability of people graduated from a registered welding course :
Significance level : 
Critical value : 
A confidence interval for population proportion is given by :-

Hence, the 95 percent confidence interval for the proportion of all welders who graduated from a registered welding course = (0.4247,0.7753)
Answer:
Attached
Step-by-step explanation:
The graph is attached, showing f(x) and the domain.
The points in the extremities are (-5,0) and (3,6)