A variable that might contaminate research findings would be an example of which of the following.

Which group in an experiment would receive no treatment?

The mean is always the best measure of central tendency, even when the dataset includes extreme values.

A marketing student is preparing to study the impact of social media frequency on brand awareness. Which of the following is the best example of a well-constructed hypothesis?

If you had a situation in which your sample had extreme outliers (e.g., a couple of people with extremely high incomes), which statistic might be the best one to capture the dispersion?

Which maneuver involves the patient rapidly moving from a lying-down to a sitting position, followed by a head turn towards the affected ear, with the goal of dislodging and repositioning otoconia from the posterior semicircular canal? 

Open this link and follow the prompts in the Voicethread to add video comments responding to the prompts.  When finished, type in this question that you have uploaded your comments in order to submit.

An audiologist is preparing to assess a 15-month-old toddler’s hearing. The setup includes speakers on either side of the child and animated toys that light up. What type of audiological assessment is being prepared? 

Which of the time durations are used in classroom noise measurements performed with a sound level meter? 

In a posteroanterior (PA) projection of the chest being used for cardiac evaluation, the heart measures 15.2 cm between it’s widest points.  If the magnification factor is known to be 1.4, what is the true actual diameter of the heart?