Statistic unit 5 (chp 9 and 14)

             In statistic chapter 14, I learnt about mean, median, range, mode, dot plot, scatter, stem-and-leaf plot, organizing data, collecting data, interpreting data, bar graph, pie chart, line graph,pictograph and many more. First, we make a presentation about the terminology of statistic. Then, we interviewed our surrounding and then we make a report for collecting data. Using the result that we have interviewed we organize our result using bar graph, pie chart and pictograph. Then we interpret the data using mean, median and mode.

Chapter Contents

14:01 Collecting Data

14:02 Sorting Data

14:03 Analyzing Data

14:04 Grouped Data

14:05 Dot Plot and Scatter Diagram

14:06 Stem and Leaf Plots

           

             We also make a time table about our daily schedule in a week. We have done 2 classwork from 14:03, 14:05 and 14:06. Then we interviewed or search minimum 40 couple about their wedding anniversaries dates and months. Then we should make a written report and interpret the data using stem-and-leaf plot, dot plot and scatter.

Mean is the average of the numbers: a calculated "central" value of a set of numbers. 

To calculate: Just add up all the numbers, then divide by how many numbers there are.

Example: what is the mean of 2, 7 and 9?
Add the numbers: 2 + 7 + 9 = 18
Divide by how many numbers (i.e. we added 3 numbers): 18 ÷ 3 = 6
So the Mean is 6

Median is the middle number (in a sorted list of numbers). We can find median by placing or sorting the number you were been given in value order then you find the middle number.

Example: find the Median of {13, 23, 11, 16, 15, 10, 26}. 
Put them in order: {10, 11, 13, 15, 16, 23, 26}
The middle number is 15, so the median is 15.

Range is the difference between the lowest and highest values.