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  If a researcher wants to convey the central tendency of their data using a graph or visual, what type of statistics are they using?  

  What is the key difference between a directional (one-tailed) and nondirectional (two-tailed) test?  

  Which of the following best describes variability in a dataset?  

Which explains how NSAIDs cause ulcers?

  Shaan is planning on going to a nice dinner with some friends to celebrate a recent accomplishment. He wants to know how much to expect to spend, so he tells his friends what he spends on average when going out to dinner alone (M: 20, SD: 5). Based on that information, they tell him that this dinner will probably have a z score of 1.5. What does that tell him about how much he is going to spend on dinner?  

  A researcher finds a nonsignificant result (p = .07) but with a moderate effect size. What should be considered?  

  The general formula for a confidence interval for a population mean is  

  What makes a research design quasi-experimental?  

  Which of the following is an example of sampling bias rather than sampling error?  

  A z score of -1.5 indicates the value is