Line Graphs: Line graphs use lines to connect data points, usually representing trends or changes over time. They’re great for showing continuous data and how it fluctuates. Bar Graphs: Bar graphs are made up of vertical or horizontal bars to represent data. They’re perfect for comparing categories or groups and showing the magnitude of different
Class Boundaries: Imagine we’re dealing with a set of data, and we want to organize it into groups to better understand it. Class boundaries, also known as true class limits, are numbers that help us define these groups. For instance, in a series of points like 59.5, 62.5, and so on, these points are called
Four Scales of Measurement: Nominal: Data is categorized into distinct groups with no specific order. Examples include gender, ethnicity, and eye color. Ordinal: Data can be ranked or ordered, but the differences between values are not consistent or meaningful. Example: Education levels (e.g., high school, college, postgraduate). Interval: Data is measured on a scale where
Quantitative Variables take values that very in terms of magnitude. They are easy to measure and compare with one another. These may be scores obtained in a test, weight, height, age, distance, number etc. Qualitative Variables are those that differ in kind. They are only categorized. The differences are usually in kind such as marital
(1) Define the term “Statistics” correctly.. (2) Distinguish between statistics and statistic. (3) Discuss the place of statistics in education. (4) Explain the relationship between statistics and probability. (5) Explain clearly some basic statistical concepts and notations. (1) Statistics refers to the study of collecting, organizing, analyzing, interpreting, and presenting data. It involves methods
Parametric tests are statistical tests that make specific assumptions about the underlying distribution of the data, such as normality and homogeneity of variance. They typically involve parameters that define the population distribution, like means and variances. Examples include t-tests, ANOVA, and linear regression. Non-parametric tests, on the other hand, do not assume any specific