KEY FEATURES: Introduces students to developing research questions and shows their importance in driving research design. Rarely taught topics, such as how to enter and clean data, offer students information missed in both research methods and statistics courses. Shows how to write up survey results for academic, business and nonprofit reports to alleviate the confusion students feel about how to write up findings. Rigorous treatment of sampling focuses on many sampling issues from probability theory to weighting. Offers the process of actually conducting a survey with advice on administering surveys, incentives, and improving response rates.

How Do We Examine Central Tendency in Continuous Variables?

Erin Ruel

The arithmetic mean or median is used to estimate the central tendency or typical response of continuous variables. The mean is calculated as the sum of all responses divided by the number of responses: mean ofx¯=Xn. The median is defined as the 50th percentile of the distribution of the variable from the lowest value to the highest value. If the distribution is broken up into four quarters (called quartiles) with 25% of the distribution in each, the median is at the end of the second quartile. It is the very central response. When the distribution of the continuous variable is perfectly symmetrical, the median and mean will be virtually identical.

We call this symmetrical distribution ...

  • Loading...
locked icon

Sign in to access this content

Get a 30 day FREE TRIAL

  • Watch videos from a variety of sources bringing classroom topics to life
  • Read modern, diverse business cases
  • Explore hundreds of books and reference titles