Part A:
From the central limit theorem, since the number of samples is large enough (up to 30), the mean of the the mean of the average number of moths in 30 traps is
0.6.
Part B:
The standard deviation is given by the population deviation divided by the square root of the sample size.

Part C:
The probability that an approximately normally distributed data with a mean, μ, and the standard deviation, σ, with a sample size of n is greater than a number, x, given by

Thus, given that the mean is 0.6 and the standard deviation is 0.4, the probability that <span>the average number of moths in 30 traps is greater than 0.7</span> given by:
Answer:

Step-by-step explanation:

Answer:
5.24
Step-by-step explanation:
The volume of the sculpture will be found by partition he sculpture such that we find the volume of different parts as follows:
volume of cuboid is given by:
v=length*width*height
thus the volume of the sculpture will be:
Volume=(15*4*4)+(10*4*4)+(5*4*4)
volume=240+160+80
volume=480 cubic inches