Q.1 The manufacturer of television tubes knows from the past experience that the average life of tube is 2000 hrs with a s.d. of 200 hrs. A sample of 100 tubes has an average life of 1950 hrs. Test at the 0.01 level of significance to see if this sumple same from a normal population of mean 2000 hrs.
Answers
Answered by
0
Answer:
2000*200*100
Step-by-step explanation:
2250*552=555
Similar questions