In an Early Study, Researchers at a University Found That

question 71

Multiple Choice

In an early study, researchers at a university found that 33% of the first year students had received at least one A in their first semester. Administrators are concerned that grade inflation has caused this percentage to increase. In a more recent study, of a random sample of 500 first year students, 185 had at least one A in their first semester.
-The appropriate hypotheses that attempt to test the claim that the proportion of first year students receiving at least one A is now greater than one-third (.33) is _____.

• A)H₀: p ≤ .37 vs H_a: p > .37
• B)H₀: p ≥ .33 vs H_a: p < .33
• C)H₀: p ≤ .33 vs H_a: p > .33
• D)H₀: p = .33 vs H_a: p ≠ .33
• E)H₀: p ≠ .33 vs H_a: p = .33

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Definitions:

Atm

A unit of pressure, also known as atmosphere, approximately equal to the earth's atmospheric pressure at sea level.

Temperature

A measure of the average kinetic energy of the particles in a system, signifying how hot or cold the system is.

°C

Degrees Celsius, a unit of temperature on the Celsius scale, where 0°C represents the freezing point of water, and 100°C its boiling point at sea level.

Atm

Standard atmosphere, a unit of pressure defined as 101,325 Pa; also used to denote the atmospheric pressure at sea level.