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Another Practice Final

# Another Practice Final - Directions Do not write on this...

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Directions: Do not write on this exam. You may use formula cards, a calculator, and probability tables. The time limit for this exam is 1.5 hours. Final Exam Version A 1. Randomly selected statistics students participated in an experiment to test their ability to determine when a single minute had past without using a watch. Test the professor’s claim that students on average will report a time that is less than 60 seconds. A sample of 40 students had a sample mean of 58.3 seconds. Assume the population standard deviation is known to be 9.5 seconds, and test the professor’s claim using a 5% significance level. 2. Find a 95% confidence interval for the true average number of seconds perceived as a minute by statistics students. Use the information from the above problem. 3. Body temperatures for humans are normally distributed. Twenty-five randomly selected people had a mean body temperature of 98.2 with a standard deviation of 0.62. Does this data contradict the status quo belief that the average human body temperature is 98.6?

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