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A researcher studies the relationship between taking aminoglycosides and muscle strength in a random sample of...

A researcher studies the relationship between taking aminoglycosides and muscle strength in a random sample of patients who take aminoglycosides and a random sample of patients who do not take aminoglycosides. An average strength score is calculated for each participant. To determine if there is a statistically significant difference in the average strength score an independent t-test is utilized. The researchers report that taking aminoglycosides is associated with a lower average strength score (t=1.984, p=0.025). You know this means:

A type I error was made

Equal variances was not assumed.

The Levene's test was insignificant

There is a statistically significant difference in the average strength score between the two groups.
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There is a statistically significant difference in the average strength score between the two groups.

  

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