Question

for the following study, identify the population, sample, population parameter, and sample statistic.

astronomers typically determine the distance to a galaxy (a huge collection of billions of stars) by measuring the distances to just a few stars within it and taking the mean (average) of these distance measurements.

what is the population?

a. all stars
b. all stars in the galaxy
c. all galaxies
d. the stars that were selected for measurement

identify the sample. choose the correct answer below.

a. all stars
b. all stars in the galaxy
c. all galaxies
d. the stars that were selected for measurement

Explanation:

Identify the population

Using the Statistical Population knowledge point
The study aims to determine the distance to a specific galaxy, which is defined as "a huge collection of billions of stars." The population represents the entire collection of individuals or objects of interest. Therefore, the population is all stars in that galaxy.

Identify the sample

Using the Sample vs Population knowledge point
The sample is the subset of the population from which data is actually collected. The study measures "the distances to just a few stars within it." Therefore, the sample is the stars that were selected for measurement.

Answer:

Question 1

• (A) All stars
• (B) All stars in the galaxy (Correct answer)
• (C) All galaxies
• (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)