Psychological Statistics

Charlotte Joseph
Quiz by , created about 5 years ago

Quiz on Psychological Statistics, created by Charlotte Joseph on 03/17/2014.

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Charlotte Joseph
Created by Charlotte Joseph about 5 years ago
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Question 1

Question
A researcher is interested in the eating behaviour of 5 year olds and selects a group to be tested in a research study. The group of 25 five year olds is a:
Answer
  • Sample
  • Statistic
  • Population
  • Parameter

Question 2

Question
A researcher is curious about the average IQ of registered voters in the state of Florida. The entire group of registered voters in Florida is an example of a:
Answer
  • Sample
  • Statistic
  • Population
  • Parameter

Question 3

Question
Although research questions typically concern a ______ research study typically examines a ______.
Answer
  • Sample, population
  • Statistic, sample
  • Population, sample
  • Parameter, Population

Question 4

Question
Statistical methods that use samples to answer general questions bout a population are called _______.
Answer
  • Parameters
  • Statistics
  • Descriptive statistics
  • Inferential statistics

Question 5

Question
Statistical techniques that summarise, organise and simplify data are classified as ________.
Answer
  • Population statistics
  • Sample statistics
  • Descriptive statistics
  • Inferential statistics

Question 6

Question
In an experiment, the researcher manipulates the _______ variable and measures changes in the ________ variable.
Answer
  • Population, sample
  • Sample, population
  • Independent, dependent
  • Dependent, independent

Question 7

Question
A researcher observed that preschool children playing in a red room showed more aggression than playing in a blue room. For this study, what is the independent variable?
Answer
  • Preschool children
  • Colour of the room
  • Amount of aggression
  • The children's play

Question 8

Question
In a study evaluating the effectiveness of a new medication designed to control high blood pressure, one sample of individuals is given the medicine and a second sample is given an inactive placebo. Blood pressure is measured for each individual. For this study, what is the dependent variable?
Answer
  • The medication
  • The placebo
  • Blood pressure
  • The individuals given the medication

Question 9

Question
A hypothesis test is ______.
Answer
  • A descriptive technique that allows researchers to describe a sample
  • A descriptive technique that allows researchers to describe a population
  • An inferential technique that uses the data from a sample to draw inferences about a population
  • An inferential technique that uses information about a population to make predictions about a sample

Question 10

Question
The null hypothesis _______.
Answer
  • States that the treatment has no effect
  • Is denoted by the symbol H1
  • Is always stated in terms of sample statistics
  • All of the choices are correct

Question 11

Question
The null hypothesis ______.
Answer
  • Concerns a population with an unknown mean
  • Is denoted by the symbol H0
  • Generally states that there is no effect, no change or no difference
  • All of the other choices are correct

Question 12

Question
The final step of hypothesis testing is to ______.
Answer
  • Locate the values associated with the critical region
  • Make a statistical decision about H0
  • Collect the sample data and compute the test statistic
  • State the hypotheses and select an alpha level