# Question: The following are 24 consecutive downtimes in minutes of a

The following are 24 consecutive downtimes (in minutes) of a particular machine.

The null hypothesis of randomness is to be tested against the alternative that there is a trend. A MINITAB analysis of the number of runs above and below the median follows.

a. Confirm the values reported for the median and the number of runs by calculating them yourself.

b. Compute the value of z_ and the p-value.

c. Would you reject the hypothesis of randomness? Explain.

d. Construct a graph that displays the sample data and visually supports your answer to part c.

The null hypothesis of randomness is to be tested against the alternative that there is a trend. A MINITAB analysis of the number of runs above and below the median follows.

a. Confirm the values reported for the median and the number of runs by calculating them yourself.

b. Compute the value of z_ and the p-value.

c. Would you reject the hypothesis of randomness? Explain.

d. Construct a graph that displays the sample data and visually supports your answer to part c.

## Answer to relevant Questions

According to an August 26, 2008, press release from the U.S. Census Bureau News, the median household income in 2007 was $50,023. A random sample of 250 incomes has a median value different from that of any of the 250 ...Research Randomizer is a free service offered to students and researchers interested in conducting random assignment and random sampling. Although every effort has been made to develop a useful means of generating random ...The following data represent the ages of 12 subjects and the mineral concentration (in parts per million) in their tissue samples. Referring to Applied Example 14. 15: a. Explain the meaning of “the mean scores are significantly different (p = 0.0001) What mean scores are being referred to? What methodology might have been used to establish this ...A candy company has developed two new chocolate- covered candy bars. Six randomly selected people all preferred candy bar I. Is this statistical evidence, at a = 0.05, that the general public will prefer candy bar I?Post your question