9 suppose you were going to conduct a survey of

  • University of Phoenix
  • PSY 315
  • Homework Help
  • maydencanada
  • 11
  • 80% (5) 4 out of 5 people found this document helpful

This preview shows page 8 - 11 out of 11 pages.

9. Suppose you were going to conduct a survey of visitors to your campus. You want the survey to be as representative as possible. a. How would you select the people to survey?
WEEK TWO PRACTICE WORKSHEET 9 interest to certify that the sample size is substantial enough to accurately signify the people involved with the survey. The random selection method for choosing a sample that utilizes genuinely random methods, specifying that individually, each and every single person in the populace has an equal opportunity of being nominated in the outcome of the random sampling (Films Media Group, 2005). b. Why would that be your best method? “The strategy in almost all psychology research is to study a sample of individuals who are believed to be representative of the general population (or of some particular population of interest). More realistically, researchers try to study people who do not differ from the general population in any systematic way that should matter for that topic of research.” (Aron, Coups, & Aron, 2013, Chapter 3: Some Key Ingredients for Inferential Statistics: Z Scores, the Normal Curve, Sample versus Population, and Probability). By utilizing the random sampling method of research, will be the most sufficient option because random samples eradicate the likelihood of bias from the researcher which would have adverse outcomes on the study/experiment itself. 10. In a school band, 9 kids play string instruments, 10 kids play woodwind instruments, 7 kids play brass instruments, and 4 kids play percussion instruments. a. What is the probability that you randomly select a kid who plays a string or percussion instrument?
WEEK TWO PRACTICE WORKSHEET 10 (9/30)+(4/30) p = 13/30 13 out of 30 total possibilities 0.433333 b. What is the probability that you randomly select a kid who does not play a brass instrument?
0.766667
WEEK TWO PRACTICE WORKSHEET 11 References: Aron, A., Coups, E. J., & Aron, E. N. (2013). Statistics for Psychology (6th ed.). Retrieved from The University of Phoenix eBook Collection. Crossman, A. (2018). ThoughtCo. Retrieved from - sampling-3026732 Films Media Group. (2005). Inferential Statistics. Retrieved from Films Media Group, PSY315 - Statistical Reasoning In Psychology website. Khan, S. (2009, January 19). Statistics: Sample vs. Population Mean [Video file]. Retrieved from YouTube website: Wilcox, R. R., & Keselman, H. J. (2003). Modern robust data analysis methods: Measures of central tendency. Psychological Methods, 8(3), 254-274. doi:

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture