Suppose a research firm conducted a survey to determine the average amount of money steady smokers spend on cigarettes during a week. Sample size is 100. The population mean is $20 and the population...

Suppose a research firm conducted a survey to determine the average amount of money steady smokers spend on cigarettes during a week. Sample size is 100.  The population mean is $20 and the population standard deviation is $5.   What is the probability that a sample of 100 steady smokers spend within $1 of the mean?

Determine the standard error

Calculate the Z-value (report only 1 of the Z-values)

Area

Answer