In the Mid-1990s, a Study Was Conducted to Determine If

question 44

Multiple Choice

In the mid-1990s, a study was conducted to determine if arthroscopic surgery was an effective treatment for arthritis of the knee.Ten men were scheduled for surgery and each patient was anesthetized.But, after each patient was unconscious, the surgeon consulted a randomly generated code to determine whether to do the actual surgery, or to perform a "sham" surgery (make three small incisions in the knee, stitch the patient up, and leave a small scar) .This is best described as a(n) _________________ study.

• A) voluntary
• B) observational
• C) medical
• D) experimental

---

Definitions:

Decimal

A system of numbers based on powers of ten, incorporating a point to separate the integer part from the fractional part of a number.

Lowest Terms

The simplest form of a fraction, where the numerator and the denominator are reduced to their smallest values.

Arabic Numerals

A widely used numerical system that includes the digits 0 through 9, originated in India and later adopted by the Arab world.

Equivalent Fractions

Fractions that represent the same portion of a whole, even though they have different numerators and denominators.