An HP laser printer is advertised to print text documents at a speed of 18 ppm (pages per minute). The manufacturer tells you that the printing speed is actually a Normal random variable with a mean of 17.57 ppm and a standard deviation of 3 ppm. Suppose that you draw a random sample of 11 printers. Part i) Suppose the number of printers drawn is quadrupled. How will the standard deviation of sample mean printing speed change? A. It will decrease by a factor of 2. B. It will decrease by a factor of 4. C. It will increase by a factor of 2. D. It will increase by a factor of 4. E. It will remain unchanged. Part i) Suppose the number of printers drawn is quadrupled. How will the mean of the sample mean printing speed change? A. It will decrease by a factor of 4. B. It will increase by a factor of 4. C. It will increase by a factor of 2. D. It will decrease by a factor of 2. E. It will remain unchanged. Part i) Consider the statement: 'The distribution of the mean printing speed of the sampled printers is Normal.' O A. It is a correct statement, and it is a result of the Central Limit Theorem. B. It is an incorrect statement. The distribution of the mean printing speed of the sample is not Normal. C. It is a correct statement, but it is not a result of the Central Limit Theorem.

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.