## Question

###### A marketing research company carried out a survey to determine the mean the mounds that smokers spend on cigarettes. The company found that the distribution of the amount spent by week tended to follow a normal distribution, with a standard deviation of $5. a sample of 49 smokers revealed that an average of $20. with 95% confidence level, compute the confidence interval for the mean amount that smokers spend on cigarettes in one week.

A marketing research company carried out a survey to determine the mean the mounds that smokers spend on cigarettes. The company found that the distribution of the amount spent by week tended to follow a normal distribution, with a standard deviation of $5. a sample of 49 smokers revealed that an average of $20. with 95% confidence level, compute the confidence interval for the mean amount that smokers spend on cigarettes in one week.

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