Duane Said:

How do you find the sample size when population standard deviation is Unknown??

We Answered:

The question is not asking for the sample size, it is asking for the **amount you should use a possible cost**. You want a conservative estimate for the worst case scenario, so you are 99% confident that the worst case scenario would be 12,603.8 or the last point within your boundary on your CI with alpha =.01

Zachary Said:

Streptococcus Case Study: R U up for the challenge? (Relax its multiple choice)?

We Answered:

1. D
2. D
3. A
4. C
5. C
6. D
7. A

Agnes Said:

Studying for my chemistry exam, a few sample questions from a previous year's exam:?

We Answered:

1) polyethene is an alkene and can therefore undergo substitution reactions especially with halogens like bromine. what happens actually is that 2 bromine atoms will be attached on the 2 carbons involved in the double bond of the alkene by breaking the bond. alteration to the bond surely causes physical changes to color or appearance depending on the reaction

2) temperature always increases the rate of reactions because it decreases the activation energy of a reaction

i hope this helps u