THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION:
Let the random variable X follow a normal distribution with a mean of μ and a standard deviation of σ.Let 
1 be the mean of a sample of 16 observations randomly chosen from this population,and 
2 be the mean of a sample of 25 observations randomly chosen from the same population.
-Suppose that 15% of all invoices are for amounts greater than $1,000.A random sample of 60 invoices is taken.What is the mean and standard error of the sample proportion of invoices with amounts in excess of $1,000? What is the probability that the proportion of invoices in the sample is greater than 18%?
Definitions:
Amino Acid
Organic compounds that serve as the building blocks of proteins, playing critical roles in biological processes.
Eukaryotic mRNA
Messenger RNA in eukaryotes, which is synthesized from DNA and carries genetic information from the nucleus to the ribosome for protein synthesis.
Half Life
The time required for half of the atoms in a sample of a radioactive element to decay into a different isotope or element.
mRNA Degradation
The process of breaking down messenger RNA molecules, which is crucial for controlling the levels of specific proteins produced within cells.
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