Psy 102 - Psychological Statistics: Basic Concepts and Data Measurement
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Questions and Answers

What is the main purpose of descriptive statistics?

  • Summary calculations and presentation of data (correct)
  • Making inferences about a population
  • Extracting relevant information from gathered data
  • Analysis of variance (ANOVA)
  • Which type of statistics involves making inferences about a population using data from a smaller sample?

  • Correlation analysis
  • Nonparametric tests
  • Descriptive statistics
  • Inferential statistics (correct)
  • What is the term for the characteristic or condition that the experimenter manipulates, controls, or observes?

  • Moderating variable
  • Statistic
  • Variable (correct)
  • Parameter
  • Which variable is also known as the criterion or outcome variable?

    <p>Dependent variable</p> Signup and view all the answers

    What is the term for variables that influence the direction and/or magnitude of the relationship between the independent and dependent variable?

    <p>Moderating variable</p> Signup and view all the answers

    Which example represents an independent variable?

    <p>Anxiety</p> Signup and view all the answers

    What does inferential statistics involve?

    <p>(Probably) making inferences, estimates, or predictions about a population using a sample</p> Signup and view all the answers

    What is the term for the process of assigning values or labels to variables?

    <p>(Measurement)</p> Signup and view all the answers

    How are statistics used by a psychologist in the context of the text?

    <p>To analyze the effectiveness of an intervention program to reduce anxiety and depression</p> Signup and view all the answers

    What is the science of statistics primarily concerned with?

    <p>Collecting, presenting, analyzing, and interpreting data</p> Signup and view all the answers

    Variables and Measurement Independent variable is also called the ______ variable.

    <p>treatment</p> Signup and view all the answers

    Variables and Measurement Dependent variable is also known as the ______ variable.

    <p>outcome</p> Signup and view all the answers

    Statistics as a Tool in Research Descriptive statistics is concerned with summary ______.

    <p>calculations</p> Signup and view all the answers

    Statistics as a Tool in Research Inferential statistics involves making inferences, estimates or predictions about a large set of data (called a population) using the information gathered from a smaller set of data (called a ______).

    <p>sample</p> Signup and view all the answers

    Variables and Measurement Anxiety is an example of an ______ variable.

    <p>independent</p> Signup and view all the answers

    Variables and Measurement Test Scores is an example of a ______ variable.

    <p>dependent</p> Signup and view all the answers

    Variables and Measurement IQ is an example of a ______ variable.

    <p>moderator</p> Signup and view all the answers

    Statistics as a Tool in Research Descriptive statistics largely involves gathering, classification and ______ of data.

    <p>presentation</p> Signup and view all the answers

    Statistics as a Tool in Research Examples of descriptive statistics include class average of examination, average salary, range of family income, percentage of students who obtained a grade higher than ______.

    <p>90</p> Signup and view all the answers

    In statistics, the descriptive measure of the population is called a ______ while a descriptive measure of a sample is called statistic.

    <p>parameter</p> Signup and view all the answers

    Statistics is the science/methods of collecting, presenting, analyzing and interpreting ______.

    <p>data</p> Signup and view all the answers

    A psychologist investigates an intervention program to help reduce anxiety and depression, and uses statistics as evidence of the ______ of the program.

    <p>effectiveness</p> Signup and view all the answers

    To an appliance store manager, statistics may refer to the brand of electric fan or refrigerator most consumers ______.

    <p>buy</p> Signup and view all the answers

    To a school principal, statistics are information regarding increase or decrease in school enrolment, faculty salary, dropout rate and ______.

    <p>absenteeism</p> Signup and view all the answers

    To a college student, statistics are his scores on quizzes, exams and ______.

    <p>assignments</p> Signup and view all the answers

    When you collect data, you utilize questionnaires, interviews, tests, observations and ______.

    <p>experiments</p> Signup and view all the answers

    Study Notes

    Descriptive Statistics

    • The main purpose of descriptive statistics is to gather, classify, and summarize data.
    • Descriptive statistics involves summarizing and organizing data to understand the basic features of the data.

    Inferential Statistics

    • Inferential statistics involves making inferences, estimates, or predictions about a population using data from a sample.
    • Inferential statistics helps to make conclusions about a larger population based on a smaller sample of data.

    Variables

    • An independent variable is also known as the predictor variable.
    • A dependent variable is also known as the criterion or outcome variable.
    • Intervening variables, also known as moderator variables, influence the direction and/or magnitude of the relationship between the independent and dependent variable.
    • Anxiety is an example of a dependent variable.
    • Test Scores and IQ are examples of quantitative variables.

    Research and Statistics

    • Statistics is the science of collecting, presenting, analyzing, and interpreting data.
    • A psychologist uses statistics as evidence of the effectiveness of an intervention program.
    • To an appliance store manager, statistics refer to data on consumer preferences.
    • To a school principal, statistics include information on school enrolment, faculty salary, dropout rate, and other relevant data.
    • To a college student, statistics include scores on quizzes, exams, and assignments.
    • Data collection methods include questionnaires, interviews, tests, observations, and surveys.

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    Description

    Learn about the basic concepts, meaning, nature and importance of statistics, distinguish types of data and levels of measurement, and identify types of variables given a research problem in the field of psychological statistics.

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