QUESTION ONE  a) A city council is studying the tourist trade. During a certain year, the mean expenditure per tourist  was ?=?550 with variance 6400. The city takes a random sample of 10 tourists and calculates  their average expenditure ?̅.   (i) What is the mean   (ii) What is the variance, and what is   (iii) Standard deviation of the distribution?

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QUESTION ONE 
a) A city council is studying the tourist trade. During a certain year, the mean expenditure per tourist 
was ?=?550 with variance 6400. The city takes a random sample of 10 tourists and calculates 
their average expenditure ?̅. 
 (i) What is the mean 
 (ii) What is the variance, and what is 
 (iii) Standard deviation of the distribution?  

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