Answer:

Step-by-step explanation:
The firm tests 75 parts, and finds that 0.25 of them are notusable
n = 75
x = 0.25 \times 75 = 18.75≈19



Confidence level = 95%
So, Z_\alpha at 95% = 1.96
Formula of confidence interval of one sample proportion:


Confidence interval 
Answer:
Erm idk what you meant but the answers either 0.8 or .125
Hope this helped!
Good luck :p
~ Emmy
Answer:
8m+4g
Step-by-step explanation:
Answer:
1/3
Step-by-step explanation:
4 and 5 are two terms
two out of 6 terms is one third
therefore it has a probability of one out of three