Q1-B

Based on experience, a lab technician spends at least 3 hours to solve a problem on troubleshooting on average. A random sample of 20 computers with this problem is checked and found that the technician spends an average of 2.8 hours and a standard deviation of 0.14 hours to solve the problem

(b ) Based on experience, a lab technician spends at least 3 hours to solve a problem on troubleshooting on average. A random sample of 20 computers with this problem is checked and found that the technician spends an average of 2.8 hours and a standard deviation of 0.14 hours to solve the problem. (i) State the appropriate statistical test related to the above case study. [1 mark] (ii) At a 5% significance level, is there enough evidence to accept the claim? [10 marks]