What is 3 5/10 - 4/8 answer quickly please and a explanation
2 answers:
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I took out the greatest common factor, which is y^2 and factored from there
You’ll end up with y^2(y+2)(y+8)
Here’s my work :)
You’ll end up with y^2(y+2)(y+8)
Here’s my work :)
This picture will explain the mistake. She didn’t carry down the -2/4 and add to make sure her answer was fully correct.
population mean, μ =135
population standard deviation, σ = 15
sample size, n = 19
Assume a large population, say > 100,
we can reasonably assume a normal distribution, and a relatively small sample.
The use of the generally simpler formula is justified.
Estimate of sample mean
Estimate of sample standard deviation
Thus, using the normal probability table,
Therefore
The probability that the mean weight is between 125 and 130 lbs
P(125<X<130)=0.0731166-0.0018308
=0.0712858