# Chapter 14 Further Statistics

## 14.1 Sampling

A sample is a smaller number of items from the population. A sample of at least of 10% is considered to be a good-sized sample. In this section, we learn about data collection, sampling, statistics, types of data, Bias Intro, types of sampling, simple random sampling, stratified sampling.

Chapter 14 Further Statistics

## 14.2 Cumulative Frequency

A cumulative frequency table shows how many data values are less than or equal to the upper class boundary of each data class. In this section, we learn about Representations of Data, Cumulative Frequency, Estimate values using cumulative frequency graph, Measures of location and spread, Other Measures of Location.

Chapter 14 Further Statistics

## 14.4 Drawing Histogram

A histogram is a graphical representation of the distribution of data. The histogram is represented by a set of rectangles, adjacent to each other, where each bar represents a kind of data. In this section, we learn about representation of data, histogram, histogram equal class intervals, histogram with unequal class intervals.

Chapter 14 Further Statistics

## 14.6 Comparing and Describing Populations

The interquartile range measures the spread of the middle 50% of data. To compare data sets, compare a measure of average and a measure of spread. In this section, we learn Measures of location and spread, Measures of Central Tendency, mean, median, mode, range, interquartile range.

Chapter 14 Further Statistics