1. State the null hypothesis2. State the alternative hypothesis3. What is the critical value?4. Find ?3. 5. Find E3. 6. compute the value of test statistic 7. State the decision and conclusion

Use the following information for Q1 - Q7 The computer manufacturer reports in its advertising that the mean life of the terminal, under normal use, is 6 years, with a standard deviation of 1 year. A sample of 300 units sold 10 years ago revealed the following distribution of the lengths of life. At the 0.05 significance level, perform a test to determine whether the computer lives are normally distributed with u = 6 and 0 = 1. Length of Life (years) Frequency Ei = nm = 300-m 0 up to 4 25 4 up to 5 50 5 up to 6 80 E3 6 up to 7 70 7 up to 8 50 8 or more 25