Answer: False
Hope it's helful
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:



Looks like you did most of it.
The next step would be setting them equal to 105, like the problem suggests.



Then we can plug back in to find the numbers.




The three numbers are
.
Hope this helps.
頑張って!
Answer:
b= (-6,-7)
c= (-6,-2)
d= (0,-2)
e= (4,-7)
Step-by-step explanation:
1 hour=1/6+1/6+1/6
1 hour=3/6
1 hour=1/2
for every hour, the snail moved 1/2 a foot