The owner of a petrol station wished to determine the proportion of customers who use a credit card to pay at the pump. He surveyed 200 customers and found that 120 customers use credit card to pay at the pump.Construct a 96% confidence interval for the population proportions who use a credit card to pay at the pump.
Anyone can help me solve this question?(Worried)
Re: Confidence interval.
Surely your notes and/or textbook have examples to follow? What have you tried? Where are you stuck? Please be more specific in what you cannot do.
Originally Posted by JWEI