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1. Incomes in a certain town are strongly-right skewed with mean $36000 and standard deviation $7000. A random sample of 10 households is taken. What is the probability the average of the sample is more than $38000?
A. 0.3875B. 0.1831C. Cannot say
2. Incomes in a certain town are strongly right-skewed with mean $36000 and standard deviation $7000. A random sample of 75 households is taken. What is the standard deviation of the sample mean?
A. $808.29B. $93.33C. $7000
3. Incomes in a certain town are strongly right-skewed with mean $36000 and standard deviation $7000. A random sample of 75 households is taken. What is the probability the sample mean is greater than $37000?
A. 0.4432B. 0.1075C. 0
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