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Chapter 9: Q. 9 (page 537)

9. A random survey of 75death row inmates revealed that the mean length of time on death row is17.4years with a standard deviation of6.3years. If you were conducting a hypothesis test to determine if the population mean time on death

row could likely be15years, what would the null and alternative hypotheses be?

a. H0: __________

b. Ha: __________

Short Answer

Expert verified
a. H0:渭鈮�12
b. Ha:渭>12

Step by step solution

01

Given Information

The average length of time on death row is 17.4years, with a standard deviation of 6.3years, according to 17 death row convicts. The hypothesis test is to see if the average period spent on death row in the population is likely to be 15years.

H0:渭鈮�12
02

Explanation part a

H0: The null hypothesis states that no difference exists between sample means or proportions, or between a sample mean or proportions and the population mean or percentage.

H0:渭鈮�12



03

Explanation part b

HaThe alternate theory is this: It is the population assertion that contradicts H0, and it is what we conclude when we rejectH0.

the alternate hypothesis is
Ha:渭>12
04

Conclusion

For the above data, the null and alternative hypotheses are provided by:

H0:渭鈮�12
Ha:渭>12

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Most popular questions from this chapter

Previously, an organization reported that teenagers spent 4.5 hours per week, on average, on the phone. The organization thinks that, currently, the mean is higher. Fifteen randomly chosen teenagers were asked how many hours per week they spend on the phone. The sample mean was 4.75 hours with a sample standard deviation of 2.0. Conduct a hypothesis test. At a significance level of a = 0.05, what is the correct conclusion?

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