- #1
aisha
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Standard deviation? COIN TOSS HELP!
I tossed a coin 20, 30 and 50 times are recorded number of heads and tails and to get the deviation I first subtracted the expected from the observed for both heads and tails then I squared this value and divided it by the number of events and then toook the square root of this final value to get the standard deviation, its all in a chart and tells you what to do step by step.
for 20 tosses = 0.70 standard deviation
30 tosses=0.70 standard deviation
50 tosses = 1.41 standard deviation
The question says compare the standard deviations from the expected 20, 30, 50 tosses, what seems to be the relationship between the sample size and the standard deviation?
I think as the sample size gets bigger the standard deviation also increases, I am not sure can someone please help me out please.![Cry :cry: :cry:](/styles/physicsforums/xenforo/smilies/cry.png)
I tossed a coin 20, 30 and 50 times are recorded number of heads and tails and to get the deviation I first subtracted the expected from the observed for both heads and tails then I squared this value and divided it by the number of events and then toook the square root of this final value to get the standard deviation, its all in a chart and tells you what to do step by step.
for 20 tosses = 0.70 standard deviation
30 tosses=0.70 standard deviation
50 tosses = 1.41 standard deviation
The question says compare the standard deviations from the expected 20, 30, 50 tosses, what seems to be the relationship between the sample size and the standard deviation?
I think as the sample size gets bigger the standard deviation also increases, I am not sure can someone please help me out please.
![Cry :cry: :cry:](/styles/physicsforums/xenforo/smilies/cry.png)