Answer:
They are 9, 5 and 8
Step-by-step explanation:
Answer: 
Step-by-step explanation:
The confidence interval for population mean is given by :-

Given : Sample size : n= 35 , large sample (n>30)
Mean difference : 
Standard deviation : 
Significance level : 
Critical value : 
Now, the 99.9% confidence interval for the mean difference between the marks scored last week and marks scored this week by all the students will be :-

Hence, the 99.9% confidence interval for the mean difference between the marks scored last week and marks scored this week by all the students = 
TeX rendering has been iffy at best on this site for the past few days, at least in my experience. I've attached a solution below.
Answer:
average of siblings with that height and weight
Step-by-step explanation: