Homework answers / question archive / The average life expectancy of a certain brand of tire has been 40,000 miles

The average life expectancy of a certain brand of tire has been 40,000 miles

Statistics

Share With

The average life expectancy of a certain brand of tire has been 40,000 miles. Because of a new manufacturing process introduced, it is believed that the life expectancy has increased. To test the validity of this, what are the null and alternative hypotheses?