A Study of College Dropouts Models the Number of Undergraduate

question 39

Multiple Choice

A study of college dropouts models the number of undergraduate credits a student successfully earns prior to quitting using an exponential random variable.If the observed average number of credits earned is 22.5, what proportion of students drop out with more than 100 credits, assuming an exponential random variable is appropriate here?

• A) 0.0117
• B) 0.0392
• C) 0.9802
• D) 0.2250

---

Definitions:

RNA Polymerases

Enzymes responsible for transcribing RNA from a DNA template, playing a crucial role in the process of gene expression.

Transcription

The process by which the genetic information encoded in DNA is copied into messenger RNA, leading to protein synthesis.

tRNA Triplet

A sequence of three nucleotides in transfer RNA that corresponds to a complementary codon in messenger RNA during protein synthesis.

mRNA

Messenger RNA, a type of RNA that conveys genetic information from DNA to the ribosome, where proteins are synthesized.