A Large University Is Interested in Learning About the Average

question 102

Multiple Choice

A large university is interested in learning about the average time it takes students to drive to campus. The university sampled 238 students and asked each to provide the amount of time they spent traveling to campus. This variable, travel time, was then used conduct a test of hypothesis. The goal was to determine if the average travel time of all the university's students differed from 20 minutes. Find the large-sample rejection region for the test of interest to the college when using a level of significance of 0.05.

• A) Reject H0 if z < -1.645 or z > 1.645.
• B) Reject H0 if z < -1.96 or z > 1.96.
• C) Reject H0 if z > 1.645.
• D) Reject H0 if z < -1.96.

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Definitions:

Restriction Enzymes

Proteins used in molecular biology that cut DNA at specific sequences, important for genetic engineering and recombinant DNA technologies.

Sticky Ends

Short, single-stranded overhangs produced by the cutting action of certain restriction enzymes on DNA, which can readily form hydrogen bonds with complementary sticky ends.

Recombinant DNA

Any DNA molecule made by combining genes from different organisms.

Cosmid Cloning Vectors

A type of cloning vector used in molecular biology and genetic engineering to artificially build bacterial strains with large DNA fragments.