2x + 5y = 13 -x + 4y = 13 solve by elimination
1 answer:
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Answer:
.b. It is one‐half as large as when n = 100.
Step-by-step explanation:
Given that a simple random sample of 100 batteries is selected from a process that produces batteries with a mean lifetime of 32 hours and a standard deviation of 3 hours.
i.e. s = 0.3
we obtain se of sample by dividing std devitation by the square root of sample size
i.e. s=
when n =100 this = 0.3 and
when n =400 this equals 0.15
We find that when sample size is four times as large as original, std deviation becomes 1/2 of the original
Correction option is
.b. It is one‐half as large as when n = 100.
The value of K for which f(x) is a valid probability density function is 1/4.
<h3>How to solve for the value of K</h3>open the equation
2K + 2K = 1
4K = 1
divide through by 4
K = 1/4
Read more on probability density function here
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