The lifetime for a certain brand of widgets is normally distributed. A random sample of 25 widgets is taken and a sample mean li
fetime of 520 hours with a standard deviation of 50 hours. Before taking the sample, researchers claimed that the mean lifetime of a widget was more than 500 hours. 1. null hypothesis: 2. the alternative hypothesis:
3. explain what test will be used and why?
3. The test that we are going to be using is the one sample t test. This test is used to test hypothesis. It would make a comparison of h0 to the mean of the sample. Now we are using this here because the sample standard deviation was given