Question

Would you stop illegal file sharing if you received a warning with a penalty notice attached? More than 1000 adult New Zealanders (aged 15 to 50 years) were asked this. Of those who have illegally file-shared content 70% said that they would stop.

Assume that you sample n=250n=250 New Zealanders.

What is the probability (±±0.0001) that the sample proportion pˆp^ of those who would stop after being given a warning is between 0.67 and 0.73 if the population proportion is p=0.7p=0.7?

P= ??

Answer 1

The population mean of proportion is . The population standard deviation of proportion is ​

The probability, that the sample proportion pˆ of those who would stop after being given a warning is between 0.67 and 0.73 is

​​​​​​.