chrisssrutter
26.04.2020 •
Mathematics
You want to obtain a sample to estimate how much parents spend on their kids birthday parties. Based on previous study, you believe the population standard deviation is approximately σ=44.1 dollars. You would like to be 90% confident that your estimate is within 1 dollar(s) of average spending on the birthday parties. How many parents do you have to sample?
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Ответ:
The population is the main group the survey is about. In this case, it is about the school. However, his sample was just the football team.