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.
Suppose that a recent article stated that the
a. is this a right-tailed, left-tailed, or two-tailed test? How do you know?
b. Since o and Sx are given, which should be used? In 1-2 complete sentences, explain why.
c. sketch a graph of the situation. Label the horizontal axis. Mark the hypothesized mean and the sample mean x (with bar on top). Shade the area corresponding to the p-value.
d. At a pre-conceived a=0.05, what is your:
1. Decision
2. Reason for the decision
3. Conclusion (in a complete sentence)
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