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PSYC 200 Lab 1_Feb3_2012

Course: PSYC 200, Spring 2012
School: University of Maryland
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200 Statistical PSYC Methods in Psychology Lab 1 8am class TA: Say Young Kim 8am class TA: Say Young Kim Office Hours: Thursdays 10-12pm or by appt Office: Benjamin #3238 #3238 Email: saykim@umd.edu say (sayyoung.kim@gmail.com) 9:30am class TA: Mark Saffer 9:30am class TA: Mark Saffer Office Hours: Fridays at 11am and again at 2pm here in room 1040 1040 Office: BPS 1134 Email: msaffer@umd.edu (saffer64@gmail.com) First things first First things first Contracts Clarifications in the Contract 1. Any notes you would like to use are allowed for the exams. 2. Any calculators are allowed, but you have to show your work So far So far How you know what you know Authority Rationalism/ Logical Reasoning Consensus Experience Observation Scientific Method Method Statistical notation Order of operations Please excuse my dear aunt Sally Experiment or Not Naturalistic observation Parameter estimation Correlational studies Variables Variables Vs. Constants Discrete vs. Continuous Independent vs. Dependent Predictor vs. Criterion I believe in man-made climate change. believe man climate change too political political wars is never necessary. also too political How do I know this? Authority Rationalism/ Logical Reasoning Consensus Experience Observation Scientific Method Variable or Constant Variable or a Constant The number of texts you send each week The number of ounces in a pound Your alertness during the day The number of days in the month of October th The number of tires on a bicycle The height of students at UMD height of students at UMD Continuous or Discrete The number of students at UMD in a particular voting district The number of registered voters in the Prince Georges County A persons marital status persons marital status Graduating from college A persons age person age Temperature in Celsius Continuous or Discrete IF.. you can have decimal places then it is continuous it is measuring how much of some quality you is measuring how much of some quality you have then it is continuous you are measuring counts of things then it is are measuring counts of things then it is discrete (cant have decimals) even if there may be large number of the items/people in may be a large number of the items/people in question You are at a dinner party and someone mentions that having children attend school round year is bad for childrens academic performance. This person asserts that children do better in school when they get a three-month summer vacation. Since you are becoming and accomplished scientist, you decide to investigate this claim. You get 100 elementary schools to agree either to have school all year round or to have a three-month summer break. Using a coin toss, you assign 50 of the elementary schools to have school year round and the other 50 schools to have a threemonth summer break. At the end of August, you administer a test to determine at what grade level the students are reading. You record whether the students are reading above their grade level. You found that 97% of the students who attended school year round were reading above their grade level, whereas only 52% of students who had a three-month break were reading above their grade level. Is this an experiment? Why or why not? If this is not an experiment, please classify what this is called. Identify the hypothesis under evaluation. Identify the population in question. Identify the sample in question. List two sampling methods. Describe how the researcher may have used each sampling method for this example. What does having a biased sample mean? Is the current sample biased? If so, how? What is the best sampling method? Why? Identify and classify (independent or predictor vs. dependent or criterion) the variables of interest. Is there a statistic(s) used in this example. If so, identify the statistic(s) in this example. Are there any parameters in this example? If so, identify the parameter(s) in this example. Does it appear that your dinner guest was correct? Why or why not? N X i =1 i X N (7 X ) +1 i i =1 N X i =1 2 i N ( XiYi )2 i =1 7 ( X Y ) 2 i =3 ii Y 15 16 7 14 13 16 13 8 9 11 You are interested in the impact of stress on learning Design an experimental approach that addresses this question Design a non-experimental approach that addresses this question non approach that addresses this question Types of variables Independent, dependent, predictor, or criterion Discrete or continuous Population of interest Sample you might procure Please make sure you staple your homework include your name, UID, lecture time, and discussion time at the top and discussion time at the top organize your thoughts on the paper

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