Homework Statement
the weight of items produced by a production line is normally distributedwith a mean of 12 ounces and a standard deviation of 2 ounces.
a. what is the probability that a randomly selected item will weight between 8 and 16 ounces? (DONE)
b. what is the probability that a...
Homework Statement
the weight of items produced by a production line is normally distributed with a mean of 12 ounces and a standard deviation of 2 ounces.
Suppose that quality control requires the weight of items to be within 8 and 16 ounces. You select 7 items at random (each item is...
need help with this problem
x~normal(mean= 12, stdev=2)
item weight from 8 to 16 ounces
i have a random sample of 7 items and need to find the probability that 3 of those items fulfill the weight
each item is independent
this is what i got at the moment
z=(16-12)/(2) = 2
p(z<2)-p(z<-2)...
I'm here again bothering you, I have this problem, but have no idea about how to start the problem solving:
Homework Statement
The USPS will accept packages only if the length plus girth is no more than 108 inches.
Assuming that the front face is square, what is the largest volume package...
so... what is left now is to try to simplify and evaluate the second derivative right?
if I'm not mistaken, after simplifying, the derivative ends like this:
f"(x)=(2x(x^2 + 27))/(x^2 - 9)^3