18 Questions
What is the primary assumption of the Central Limit Theorem?
The sampling distribution of the sample mean is approximately normally distributed
What descriptive statistics are used for ordinal data?
Median and range
What is the purpose of descriptive statistics in simple experimental designs?
To summarise the data from each sample
What is illustrated by a scattergram and regression line?
The correlation between two variables
What is the level of measurement required for using mean and standard deviation?
Interval and ratio
What is the purpose of testing the assumption of normality?
To ensure the use of certain statistical tests
What is the main application of the Central Limit Theorem in psychological research?
Inferential statistics in diverse populations
What is the primary purpose of descriptive statistics in research?
To summarise and describe data
What is the primary distinction between descriptive and inferential statistics?
Descriptive statistics summarises data, while inferential statistics makes inferences
What is the purpose of testing the assumption of normality in statistical analysis?
To ensure the validity of parametric tests
What is the primary role of hypothesis testing in psychological research?
To advance scientific knowledge and validate findings
What is the primary advantage of using random sampling methods in research?
To increase the generalisability of the findings
What is a primary objective of performing tests for normality?
To validate the use of parametric statistical methods
What is the primary difference between descriptive and inferential statistics?
Descriptive statistics summarizes data, while inferential statistics makes conclusions about a population
What is the purpose of a paired t-test?
To compare the means of two related groups
What is a requirement for using parametric inferential tests of difference?
The data must be normally distributed
What is the purpose of a Wilcoxon signed rank test?
To compare the means of two related groups without assuming normality
What is the primary advantage of using inferential statistics?
It enables us to make conclusions about a population based on a sample
Test your understanding of Descriptive statistics, specifically the Central Limit Theorem and its application to normal distribution. Learn about the levels of measurement (NOIR) and how to use them in quantitative research methods.
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