Asample with ss = 40 and a variance of 8 has n = 5 scores. a. true b. false

The formula relating the sample variance, SS and n can be written as:

sample variance = SS / (n – 1)

so let us take that:

SS = 40

n = 5

calculate variance using the formula:

sample variance = 40 / (5 – 1)

sample variance = 10

Therefore the answer is:

False

"you start with 15.67 g mgco3-xh2o, when heated and all the water is removed, you are left with 7.58 g mgco3 only.

therefore, you had 15.67 - 7.58 = 8.09g h2o  

moles of each :

7.58g mgco3 = ? moles = 7.58g / 83.4g/mole = 0.09moles  

8 09g h2o = ? moles = 8.09g / 18g/mole = 0.44moles  

molar ratio between the two by dividing both numbers by the smallest number :

0.09 / 0.09 = 1  

0.44 / 0.09 = 4.8  

mgco3-5h2o"