Suppose a research ﬁrm conducted a survey to determine the average amount of money steady
Smokers spend on cigarettes during a week. A sample of 100 steady smokers revealed that the
Sample mean is $20 and the sample standard deviation is $5. What is the probability that a sample
Of 100 steady smokers spend between $19 and $21?
A) 0.4772
B) 0.0228
C) 0.9544
D) $20

Question

Quizplus · Accepted Answer

0.9544

Suppose a Research ﬁRm Conducted a Survey to Determine the Average