Everything Maths Grade 10

Measures of central tendency EMA75 With grouped data our estimates of central tendency will change because we lose some informat ...

Time (s) Count 35 < t 45 5 45 < t 55 11 55 < t 65 15 65 < t 75 26 75 < t 85 19 85 < t 95 13 95 < t 1 ...

10.4 Measures of dispersion EMA76 The central tendency is not the only interesting or useful information about a data set. The t ...

Percentiles EMA78 DEFINITION: Percentile Thepthpercentile is the value,v, that divides a data set into two parts, such thatpperc ...

Worked example 11: Using the percentile formula QUESTION Determine the minimum, maximum and median values of the following data ...

DEFINITION: Quartiles The quartiles are the three data values that divide an ordered data set into four groups, where each group ...

Deciles The deciles are the nine data values that divide an ordered data set into ten groups, where each group contains an equal ...

Step 2: Find the quartiles Since the data have been grouped, they have also already been sorted. Using the percentile formula an ...

Exercise 10 – 5: 1.A group of 15 learners count the number of sweets they each have. This is the data they collect: 4 11 14 7 14 ...

The box-and-whisker plot shows these five percentiles as in the figure below. The box shows the interquartile range (the distanc ...

This provides the five number summary of the data set and allows us to draw the following box-and-whisker plot. 1 ; 25 2 ; 5 3 ; ...

10.6 Chapter summary EMA7D See presentation:2GNKatwww.everythingmaths.co.za Data refer to the pieces of information that have b ...

End of chapter Exercise 10 – 7: 1.The following data set of heights was collected from a class of learners. f1,70 m;1,41 m;1,60 ...

12.A group of 20 learners count the number of playing cards they each have. This is the data they collect: 12 1 5 4 17 14 7 5 1 ...

1 2 3 4 5 6 7 8 9 0-1 A 2-3 B 4-5 C 6-7 D 8-9 E number of sweets y The data set below shows the correct information for the numb ...

17.A group of learners count the number of marbles they each have. This is a histogram describing the data they collected: 1 2 3 ...

a)Which measure of central tendency should be used for this information? b)Calculate the measure of central tendency that you ch ...

24.The stem-and-leaf diagram below indicates the pulse rate per minute of ten Grade 10 learners. 7 8 8 1 3 5 5 9 0 1 1 10 3 5 Ke ...

c)Find the mean age of the men in the factory using the original data. 29.The example below shows a comparison of the amount of ...

CHAPTER 11 Trigonometry 11.1 Two-dimensional problems 390 11.2 Chapter summary 397 ...