Hey guys, was wondering if anyone can help me understanding the working out for these questions: 23b (literally don't understand how to do absolute error), 23e, 24b)a,b,c, 28)a.ii,iii,iv (was literally confused with this one)
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2008 HSC Qs help (1 Viewer)
- Thread starter Yusra366
- Start date
Q4 seems vague. The question seems to assume Rachel is 10.5 years old but makes no mention of it.
This may help for answering
towardsdatascience.com
This may help for answering
Explaining the 68-95-99.7 rule for a Normal Distribution
The normal distribution is commonly associated with the 68-95-99.7 rule which you can see in the image above. 68% of the data is within 1…
towardsdatascience.com
Q23b
Here, we need a measurement of 1.25 L = 1,250 mL, accurate to the nearest 10 mL. In other words, we need to measure between 1245 mL and 1254.999... mL, as these are the only values that we would round to 1,250 mL (to the nearest 10 mL). Thus, our largest possible absolute error is 5 mL, as if we are out by more than this, the volume will round to either 1,240 mL or 1,260 mL (to the nearest 10 mL), and so be unacceptable:
Here, we need a measurement of 1.25 L = 1,250 mL, accurate to the nearest 10 mL. In other words, we need to measure between 1245 mL and 1254.999... mL, as these are the only values that we would round to 1,250 mL (to the nearest 10 mL). Thus, our largest possible absolute error is 5 mL, as if we are out by more than this, the volume will round to either 1,240 mL or 1,260 mL (to the nearest 10 mL), and so be unacceptable:
23e
We have a bar graph, which we interpret by looking at how long is the bar, and how long is the section representing each choice. Here, using a ruler, the bar is 9.0 cm long and the 'pizza' section is 3.5 cm long. So,
Now, the bar graph represents 450 people, so it is this percentage of 450 that we need:
We have a bar graph, which we interpret by looking at how long is the bar, and how long is the section representing each choice. Here, using a ruler, the bar is 9.0 cm long and the 'pizza' section is 3.5 cm long. So,
Now, the bar graph represents 450 people, so it is this percentage of 450 that we need:
Thank youuuQ4 seems vague. The question seems to assume Rachel is 10.5 years old but makes no mention of it.
This may help for answering
Explaining the 68-95-99.7 rule for a Normal Distribution
The normal distribution is commonly associated with the 68-95-99.7 rule which you can see in the image above. 68% of the data is within 1…
thank you for you help!23e
We have a bar graph, which we interpret by looking at how long is the bar, and how long is the section representing each choice. Here, using a ruler, the bar is 9.0 cm long and the 'pizza' section is 3.5 cm long. So,
Now, the bar graph represents 450 people, so it is this percentage of 450 that we need: