I used to enjoy pretending to be a teacher, teaching real-life school stuff. That was when I was in Primary 2, 3, and 4. Things have changed since then. I went on to do Math Buddy, then I'm not doing any forms of 'teaching' anymore.
Well, seeing that it's Teachers' Day, plus the fact that O Levels are coming, I decided to give a little E Math Question for people to ponder upon!
Here it goes. a 10-mark question on Statistics. Enjoy! Happy Teachers' Day!
Name: _____________ Index: ____-____ Date: 1 September 2008
- Aug (19) Jul (58) Jun (42) May (48)
- Apr (42) Mar (28) Feb (20) Jan (19)
- Find
- a) the mean number posts over the 8 months. [1]
- b) the standard deviation of the number of posts over the 8 months. [2]
- c) the median number of posts over the 8 months.[1]
- d) the average number of posts over the remaining 4 months of the year, if the average numbers of posts per month for that year is given as 40. [2]
- e) the maximum number of posts for the month of September, if
- (i) the mode for the first 9 months is 19. [1]
- (ii)the median for the first 9 months was 28. [1]
- f) the interquartile range of the first 8 months. [1]
- g) the range.[1]
- 19 19 20 28 42 42 48 58 Solution
- (a) 34.5 (b) 14.1 in 3sf (c) 35 (d) 51 (e) (i)19 (ii)28
- (f) 25.5 (g) 39
- So, how did you do? [ / 10]
- Oh, if you'ld like an extra question, here's one.
- Let's say another blogger also tracked his blogging frequency for the first 8 months and calculated the following:
- standard deviation = 4.2
- mean = 30
- Lower Quartile = 24
- Interquartile range = 8
a) calculate the upper quartile. [1]
b) Comment on the frequency of posts of the two bloggers in two different ways. [2]
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