Answer:
the pictures are blury sorry but i would help
Step-by-step explanation:
Answer: B. 
Step-by-step explanation:
The confidence interval for the population mean is given by :-

Given : Sample size : n= 100
Sample mean : 
Standard deviation: 
Level of confidence = 0.95
Significance level : 
Critical value : 
Then, 95% confidence interval for the population mean will be :-

Answer:
x=12
Step-by-step explanation: