A research firm conducted a survey to determine the mean amount steady smokers spend on cigarettes during a week. A sample of 49 steady smokers revealed that X is RM20 and s = RM5. Using the 90% level of confidence, determine the confidence interval for u.

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A research firm conducted a survey to determine the mean amount steady smokers spend on
cigarettes during a week. A sample of 49 steady smokers revealed that X is RM20 and s = RM5.
Using the 90% level of confidence, determine the confidence interval for u.
Transcribed Image Text:A research firm conducted a survey to determine the mean amount steady smokers spend on cigarettes during a week. A sample of 49 steady smokers revealed that X is RM20 and s = RM5. Using the 90% level of confidence, determine the confidence interval for u.
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