Chapter 3 Key Terms and Formuals
Chapter 3 Key Terms and Formuals Psych 3301
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This 3 page Class Notes was uploaded by Sana Khan on Wednesday February 11, 2015. The Class Notes belongs to Psych 3301 at University of Houston taught by Crystal Tran in Fall. Since its upload, it has received 61 views. For similar materials see Psych Stats in Psychlogy at University of Houston.
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Date Created: 02/11/15
Chapter 3 Key Terms number of standard deviations that a score is above or below if it is negative the mean of its distribution it is thus an ordinary score transformed so that it better describes the scores location in a distribution Formula ZXMSD ordinary score or any number in a distribution before it has been made into a Z score or otherwise transformed Formula XZSDM frequency distribution that follows a normal curve specific mathematically defined bellshaped frequency distribution that is symmetrical and unimodal distributions observed in nature and in research commonly approximate it table showing percentages of scores associated with the normal curve the table usually include percentages of scores between the mean and various members of standard deviations above the mean and percentages of scores more positive than various numbers of standard deviations above the mean entire group of people to which a researcher intends the results of a study to apply larger group to inferences are made on the basis of this particular set of people sample studied scores of a particular group of people studied usually considered to be representative of the scores in some larger populations method for selecting a sample that uses truly random procedures usually meaning that each person has an equal chance of being selected one procedure is for the researcher to begin with a complete list of all people in the population and select a group of them to study using a table of random numbers actual value of the mean standard deviation and so on for the population usually population parameters are not known through often they are estimated based on information in samples u population mean 0A2 population variance 0 population standard deviation descriptive statistics such as the mean or standard deviation figured from the scores in a group of people studied expected relative frequency of an outcome the proportion of successful outcomes to all outcomes term used in discussing probability for the result of an experiment or almost any event such as a coin coming up heads or it raining tomorrow number of successful outcomes divided by the number of total outcomes you would expect to get if you repeated an experiment many times understanding of probability as the proportion of a particular outcome that you would get if the experiment were repeated many times way of understanding probability as the degree of one s certainty that a particular outcome Will occur
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