Ir all the real numbers in descending order. RENNENDE
Division by is under
number is non-calon
imaginary
he HCF for the given numbers by using prime factorisation (you
use a calculator):
2 and 78
b) 144 and 90
C) 75; 120 and 150
12 and 159
e) 624 and 546 f) 220 and 284
the LCM for the given numbers either by listing their multiples
e factors (you may use your calculator):
5 and 30
b) 72 and 120
C) 60 and 135
f) 35; 105 and
e) 24; 36 and 60
6 and 104​

An automobile assembly line operation has a scheduled mean completion time, μ, of 12 minutes. the standard deviation of completion times is 1.6 minutes. it is claimed that, under new management, the mean completion time has decreased. to test this claim, a random sample of 33 completion times under new management was taken. the sample had a mean of 11.2 minutes. assume that the population is normally distributed. can we support, at the 0.05 level of significance, the claim that the mean completion time has decreased under new management? assume that the standard deviation of completion times has not changed.