TABLE 10-10 A Corporation Randomly Selects 150 Salespeople and Finds That 66

question 25

Multiple Choice

TABLE 10-10
A corporation randomly selects 150 salespeople and finds that 66% who have never taken a self-improvement course would like such a course. The firm did a similar study 10 years ago in which 60% of a random sample of 160 salespeople wanted a self-improvement course. The groups are assumed to be independent random samples. Let π₁ and π₂ represent the true proportion of workers who would like to attend a self-improvement course in the recent study and the past study, respectively.
-Referring to Table 10-11, if the firm wanted to test whether this proportion has changed from the previous study, which represents the relevant hypotheses?

• A) H₀: π₁ - π₂ = 0 versus H₁: π₁ - π₂ ≠ 0
• B) H₀: π₁ - π₂ ≠ 0 versus H₁: π₁ - π₂ = 0
• C) H₀: π₁ - π₂ ≤ 0 versus H₁: π₁ - π₂ > 0
• D) H₀: π₁ - π₂ ≥ 0 versus H₁: π₁ - π₂ < 0

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Definitions:

Fossils

Remains or impressions of ancient organisms preserved in rock, amber, or by petrification, providing evidence of past life on Earth.

U-shaped Arrangement

A specific spatial organization where objects, cells, or structures form the shape of the letter "U", often found in anatomical structures or architectural designs.

Teeth

Hard, calcified structures in the mouths of many animals, including humans, used for biting, tearing, and grinding food.

Homo Erectus

An extinct species of humanoids that lived approximately 1.9 million to 110,000 years ago, known for upright posture and significant brain growth compared to earlier hominins.