Class of 2025 (2025 HSC CHAT) (34 Viewers)

Study to success

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hmm not too sure what you mean (no pun intended),
I've never seen a question asking u to find the mean from just a CDF graph
(to find the median you just find where the y-axis equals 0.5, but i'm sure u already knew that)

This explains how to find the mean from a PDF though (continuous), maybe you can figure out how to do it from there?
View attachment 48571
(where a and b are just where the function exists)


also no pfp anymore ? 😮
isn't that formula in the image like ext math. I'm sure there's a much easier way
 

zodiacocean

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hi everyone i'm back. i don't suppose anyone knows where to find the mark scheme for the 2019 cssa biology trial??
 

banigul@30

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no i have been as well. first off as you said humans are losing the ability to think and make decisions without asking their phone (like has anyone seen the google gemini ad). secondly, with the rapid growth of ai, basically every industry has already integrated it so deeply, and a whole new industry was created. everything from banks, stock markets, small businesses, governments, heck even transport systems, traffic lights, cars, every bit of electronics has ai in it now. not to mention this is all stemming from open AI's language model that they developed. if you think about it ai is literally just a very rapidly learning brain, like a child that absorbed the entire internet and based off observing patterns has been able to speak and regurgitate articulated information. and we've given it total access to the online world, which in many aspects controls our physical lives. its almost like giving 1 really smart person who has the ability to multitask on a global scale total control. ofc if it gets out of control we can always shut it down right? but at what cost? the entire world in 3 years is already clinging to ai like life support, what would it mean for the economy, industries, governments if that were suddenly taken away? tbh the event that it goes rogue or something is probably fiction, but still, we are putting all our eggs in 1 basket...
this 100% is true, and i agree. tbh, i think the only solution that would work is only giving certain people the ability to have access to ai, but even then at what cost? because there will 100% be people who use it to their advantage and it would create an even bigger gap in the powerful and not powerful. I just feel that it's extremely important for us to consider because genuinely it's going to be very hard for us to find jobs that aren't already overtaken by ai, i understand there's prolly some niche jobs that need manual labour or expertise but other than that what about the rest of society? and the other problem is that we are still taught and expected to do things that were relevant years ago, and simultaneously expected to adapt to our new society, i don't know how to explain this but i feel like other than jobs that actually need a human, the only way to make money is create your thing or contribute to ai somehow and build on top of it, but then aren't you just adding to the fire. idkkkkkkkk i'm still trying to process my thoughts 😭

and about 'giving it total access to the online world', that's extremely frightening, how aren't people scared for their lives, i want to have the ability to think for myself and not have to rely on ai, and it seems lowk impossible because i guarantee that whoever you're competing with in your field is probably using ai, so by you not using it, you're putting yourself at a disadvantage. i'm not sure but this is definitely way more to think about than anyone expected, and it's going to be hard to navigate life with it. i would have preferred a life without ai, but it would have come into existence at some point with constant technological advancements, and it just chose to come now
 

C2H6O

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also can someone explain how tf u take out the mean from a cumulative frequency graph???
so hopefully the graph shows you where the datapoints are along the curve with 'x's or something, and from that work from the left to the right to construct a frequency table, the x coordinate of the datapoint is the value, and the frequency of it is the height it is above the datapoint on the left

for eg (hope this doesnt make it too confusing)
1754620327051.png
the (not cumulative) frequency table can be constructed as follows:
Height (cm)Frequency
1500
1554
16022
16556
17030
1758

then the average height is
 
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gossipgirllll

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so hopefully the graph shows you where the datapoints are along the curve with 'x's or something, and from that work from the left to the right to construct a frequency table, the x coordinate of the datapoint is the value, and the frequency of it is the height it is above the datapoint on the left

for eg (hope this doesnt make it too confusing)
View attachment 48573
the (not cumulative) frequency table can be constructed as follows:
Height (cm)Frequency
1500
1554
16022
16556
17030
1758

then the average height is
OMGGGGGG THANKYOU SO MUCH THIS DOES MAKE SENSE 😍 😍 😍 😍 😍
 

C2H6O

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guys i messaged my physics teacher asking whether i need to put the launch angle direction in a TWO marker physics question and got ghosted 😭 I think she's disappointed im asking that this late, i just lost so much aura 🥀
 

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