Answer:


The confidence interval of standard deviation is:
to 
Step-by-step explanation:
Given

See attachment for the formatted data
Solving (a): The mean
This is calculated as:

So, we have:




Solving (b): The standard deviation
This is calculated as:




--- approximated
Solving (c): 95% confidence interval of standard deviation
We have:

So:



Calculate the degree of freedom (df)



Determine the critical value at row
and columns
and 
So, we have:
---- at 
--- at 
So, the confidence interval of the standard deviation is:
to 
to 
to 
to 
Answer:
d. HL CBCTC
Step-by-step explanation:
The hypotenuse and one leg are congruent so the reason for congruency is HL.
Answer:
i believe the answer is 15 milliliters
Step-by-step explanation:
Answer:
0.23
Step-by-step explanation:
If you convert 0.23 into a percent, it becomes 23%, which is more than 2.3%.
<em>Hope that helps!</em>
<em>-Sabrina</em>