Question

tread-on-us has designed a new
tire, and they dont know what the average
amount of tread in
going
to be. They do
know that tread Life is normally distsibuted
with a standard deviation of 216.4 miles
(a) If the company Sampled 800 tires and
records their tread life, what is the
probability that sampe mean is between
the true mean of 600 miles over the
true man?
(b) How Large a sample must be taken &
to be 95 percent sure the sample mean
will be Within 100 miles of the truemean?
​

Answer 1

Step-by-step explanation:

Sir Isaac Newton PRS was an English mathematician, physicist, astronomer, theologian, and author who is widely recognised as one of the most influential scientists of all time and as a key figure in the scientific revolution.