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What symbol represents the random variable for given test

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Reference no: EM131666333

Question: Suppose that a recent article stated that the mean time spent in jail by a first-time convicted burglar is 2.5 years. A study was then done to see if the mean time has increased in the new century. A random sample of 26 first-time convicted burglars in a recent year was picked. The mean length of time in jail from the survey was three years with a standard deviation of 1.8 years. Suppose that it is somehow known that the population standard deviation is 1.5. Conduct a hypothesis test to determine if the mean length of jail time has increased. Assume the distribution of the jail times is approximately normal.

1. Is this a test of means or proportions?

2. What symbol represents the random variable for this test?

3. In words, define the random variable for this test.

Reference no: EM131666333

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