A student tossed her coin 200 times, and found only 42% heads.

I know this is kinda low, but possible.

Can someone work all of this out and show me how to put it into a normal model with the SD and mean? Please explain? thanks

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- Mar 25th 2008, 04:30 PMMorgan82Normal Model
A student tossed her coin 200 times, and found only 42% heads.

I know this is kinda low, but possible.

Can someone work all of this out and show me how to put it into a normal model with the SD and mean? Please explain? thanks - Mar 25th 2008, 04:42 PMbobak
Are you doing hypothesis testing ? Are you familiar with the binomial distribution ?

some pointers.

Let $\displaystyle X$ be the variable that represents the number of heads. We have $\displaystyle X \sim B(200, 0.5)$

Because you're using a large amount of trails you can use the Normal approximation $\displaystyle X \simeq \ \sim N (100 , 50)$

Bobak