Answer:
In this case Jack is only using a part or sample of the total population, so he is doing a sample standard deviation. When you use the total population you are doing a population standard deviation, otherwise, it’s always going to be the sample standard deviation.
Both deviations have different notations. The notation for this type of standard deviation (the one used by Jack) is:
"n" for the number of observations (lowercase)
"x-bar" for the average of the sample
"s" for the standard deviation
"s^2" for the variance
Answer:
Well where do you start
Step-by-step explanation:
Neither! They are both the same. 6.030 is just 6.03 with an extra zero at the end. The zero does not change the value.
Answer:
3 (5/6)
5/2
Step-by-step explanation:
Hi, to answer this question we have to write an expression with the information given.
The total width of the three beads must be equal to the number of beads (3) multiplied by the length of each bead (5/6)
Mathematically speaking:
3 (5/6)
Solving:
5/2
Feel free to ask for more if needed or if you did not understand something.
Answer:
Assuming you want to simplify the expression, it can be shortened to:
-k² - 2k
Step-by-step explanation:
What you need to do here is called grouping like terms. Like terms can be described as terms that have the same factors. In this case, the factors we're looking at are k and k²:
Given:
k - 3k² -3k + 2k²
We'll rearrange to group like expressions:
= -3k² + 2k² + k -3k
Pull out common factors:
= (-3 + 2)k² + (1 - 3)k
And simplify:
= -k² - 2k
