Jacky

Here are my reflections; Although you have produced some interesting and challenging graphs and results, your initial set-up work could be improved- you haven't made clear what your problem is, and why you are investigating this- aim to use a 'I wonder if…' type of thinking at the start of an investigation. You have investigated your issue well using the Census at School site to support. Your sample size is appropriate and detailed, and you have presented your data in a selection of good (and challenging) graphs, which help to illustrate some clear trends- however, your analysis doesn't really look at these patterns in any depth, and (without a question at the start to investigate) you cannot really answer your 'question'. I would have also been interested in seeing further groups of students investigated for heart rates, to see if you could identify any physiological differences between age groups. I like the way you have used other statistical measures to investigate the accuracy of your data. QUESTION; You identified that some of the data probably wasn't physically accurate- how could you identify and eliminate any 'rogue data'? Does it make a major difference?


 * //To use data and statistics/ To use mathematical inquiry// ||
 * Stage 1; Identify the problem and form a question || Clear question, and a good idea to investigate because it is relevant to our school and most intermediate students (and teachers) in general. ||
 * Stage 2; Plan and hypothesise || Good details included in your hypothesis- you gave some reasons for your thoughts which is excellent. You planned your actions and activities well, even mentioning the graphs you intended to use- the only thing you didn't plan for or mention was the sample size! ||
 * Stage 3; Data collection || I just need to clarify because I'm a bit confused- are you mentioning the amount of sleep people get or the time they go to bed? (9:15 could be a bedtime as well as a duration of 9h 15m). Your data is listed and you have done some grouping/ matching up of the results- this would have been time consuming! ||
 * Stage 4; Analysis of data || See above for the sorting- Did you calculate averages for the data? This would have given you further valuable information ||
 * Stage 5; Graphing and charting your data || Excellent mixture of graphs to demonstrate your data- the box and whisker is well constructed and the ranges are very intriguing. The bar chart gives another element to your data, and demonstrates some trends relating to hours of sleep. The dot plots are excellent too- well done for the variety of graphs- all are well labelled and constructed! ||
 * Stage 6; Interrogating your graphed data || Very detailed- you were thorough in looking for trends and patterns (even if they weren't there) and you picked out very fine details and comparisons between the groups. ||
 * Stage 7; Conclusion, answer and 'So What' || Excellent reflection about your data- your comparison of the data to your prediction is good- you even link this to your personal experiences. I like your theme, because I feel it has a 'So What' for you- have you quoted your data and findings to anyone in your class or at home yet??! Well done! ||