Question

question 8 (1 point)
researchers investigating the impact of training on sprinting collected data from 673
training sessions during 1992 - 1994. they kept track of the runners age, the number
of weeks the training lasted, the type of training (interval, endurance, combined), the
level of training the runner had (none, moderate, intense), the duration of the
training session in minutes, the weight and sex of the runner, and whether the runner
exhibited improvement (none, minor, major).

identify the sample.

the improvement in the sprinting of the 673 runners
the 673 runners
the 673 training sessions
the sprinting of the 673 runners

Explanation:

In statistics, a sample is the subset of the population from which data is collected. Here, researchers collected data from 673 training sessions? No, wait, the data is about the runners (their age, training details, etc.). Wait, the researchers collected data from 673 training sessions? No, the problem says "collected data from 673 training sessions during 1992 - 1994"? Wait, no, re - reading: "Researchers investigating the impact of training on sprinting collected data from 673 training sessions during 1992 - 1994. They kept track of... (runner's age, number of weeks training lasted, etc.)". Wait, no, the sample here is the 673 training sessions? No, wait, no. Wait, the question is to identify the sample. Let's recall: A sample is the group from which we get the data. The researchers collected data from 673 training sessions? Wait, no, the options: Let's analyze each option.

1. "The improvement in the sprinting of the 673 runners": Improvement is a variable, not the sample.
2. "The 673 runners": But the data is about training sessions (number of sessions, weeks, type, etc.), so maybe not. Wait, no, the researchers collected data from 673 training sessions? Wait, the problem says "collected data from 673 training sessions during 1992 - 1994". So the sample is the 673 training sessions? Wait, no, let's check the options again. Wait, the third option is "The 673 training sessions". Wait, but let's think again. The researchers are investigating the impact of training on sprinting, and they collected data from 673 training sessions (tracking runner's age, number of weeks training lasted, type of training, etc.). So the sample is the 673 training sessions? Wait, no, maybe I misread. Wait, the first part: "collected data from 673 training sessions during 1992 - 1994". So the sample is the 673 training sessions. Wait, but let's check the options. The third option is "The 673 training sessions". Wait, but let's check other options. "The 673 runners": But the data includes training - related variables (number of sessions, weeks, type, etc.), which are about the training sessions, not just the runners. "The sprinting of the 673 runners": Sprinting is a variable, not the sample. "The improvement in the sprinting of the 673 runners": Improvement is a variable. So the correct sample is the 673 training sessions? Wait, no, wait the problem says "collected data from 673 training sessions", so the sample is those 673 training sessions. So the correct option is "The 673 training sessions". Wait, but let me re - check. Wait, maybe I made a mistake. Let's recall the definition of a sample: A sample is the set of observations (or data points) we collect. Here, the researchers collected data from 673 training sessions (each training session has data like runner's age, number of weeks, etc.). So the sample is the 673 training sessions. So the correct option is the third one: "The 673 training sessions". Wait, no, wait the problem says "collected data from 673 training sessions", so the sample is those 673 training sessions. So the answer is "The 673 training sessions".

Wait, no, maybe I messed up. Let's check the options again. The question is to identify the sample. Let's think about what the researchers are sampling. They are sampling training sessions (673 of them) to study the impact of training on sprinting. So the sample is the 673 training sessions. So the correct option is "The 673 training sessions".

Answer:

C. The 673 training sessions