Answer:
All
Step-by-step explanation:
Answer:
(a) The sample variance is 16.51
(a) The sample standard deviation is 4.06
Step-by-step explanation:
Given

Solving (a); The sample variance.
First, calculate the class midpoints.
This is the mean of the intervals.
i.e.





So, the table becomes:

Next, calculate the mean




Next, the sample variance is:

So, we have:



The sample standard deviation is:



Answer:
1. x = 1, -2
2. no solution
3. x = 6 -4
hope this helps!
Step-by-step explanation:
For 3 it’s b. For 2 it’s 8. For 4 it’s the whole number
Answer:
I’m sorry I can’t really see it but I think it’s 7 20
Step-by-step explanation: