Mean and variance of the total cost
The total cost for a production process is equal to $1,000 plus 2 times the number of units produced. The man and variance for the number of units produced are 500 and 900 respectively. Find the mean and variance of the total cost.
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Find the value of t for the difference between two means based on an assumption of normality and this information about two samples. (Use sample 1 - sample 2. Give your answer correct to two decimal places.)
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