Question

1. spencer has a dataset containing information on the morning commute times of 2000 people in her city. she runs two simulations with a sample size of 100 people each time. the first simulation produces a sample mean of 27 minutes, while the second simulation produces a sample mean of 23 minutes. spencer concludes that these simulations are ____ because sample to sample variability is ____

Explanation:

Step1: Understand sample variability

Sample - to - sample variability refers to the differences in sample statistics (like means) from different samples drawn from the same population.

Step2: Analyze the situation

Spencer has two different sample means (27 minutes and 23 minutes) from two samples of size 100 each drawn from a population of 2000. This shows that sample - to - sample variability exists.

Answer:

unreliable; present