Question

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Explanation:

Identify the statistical population

Using the Statistical Population knowledge point
The study aims to determine the distance to a galaxy by measuring the distances to stars within it. The entire collection of interest is all stars in that specific galaxy.

• Correct Option: B. All stars in the galaxy

Identify the sample

Using the Sample vs Population knowledge point
The sample is the subset of the population actually measured. Here, astronomers measure the distances to "just a few stars within it."

• Correct Option: D. The stars that were selected for measurement

Identify the population parameter

Using the Population Parameter knowledge point
The parameter is a numerical characteristic of the entire population. The goal is to find the distance to the galaxy using the mean distance of all its stars.

• Correct Option: A. The mean distance between all stars in the galaxy and Earth

Answer:

Question 1

• (A) All galaxies
• (B) All stars in the galaxy (Correct answer)
• (C) All stars
• (D) The stars that were selected for measurement

Question 2

• (A) All stars
• (B) All stars in the galaxy
• (C) All galaxies
• (D) The stars that were selected for measurement (Correct answer)

Question 3

• (A) The mean distance between all stars in the galaxy and Earth (Correct answer)
• (B) The distances between each star in the galaxy and Earth
• (C) The distances found in the study
• (D) The mean distance between all stars that were selected for measurements and Earth