If 40 men took 10 minutes to make 200 toys,how many man will take 40 minutes to make 350 toys?
1 answer:
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Answer:
Step-by-step explanation:
Since there aren't any like terms, the answer would be:
Hope this helps!
Answer:
See the proof below.
Step-by-step explanation:
For this case we just need to apply properties of expected value. We know that the estimator is given by:
And we want to proof that
So we can begin with this:
And we can distribute the expected value into the temrs like this:
And we know that the expected value for the estimator of the variance s is , or in other way
so if we apply this property here we have:
And we know that so using this we can take common factor like this:
And then we see that the pooled variance is an unbiased estimator for the population variance when we have two population with the same variance.
Eq. of line through (1,2) and (4,5) is
x-y+1=0
x-y+1=0