The length of steel rods produced by a machine are normally distributed with a mean length of 20cm and a standard deviat
Posted: Thu Apr 28, 2022 7:21 am
The length of steel rods produced by a machine are normally
distributed with a mean length of 20cm and a standard deviation of
0.5cm. What is the probability that a randomly selected steel rod
will have a length that is:-
less than 19
cm; (2
marks, 1 mark for correct answer, 1 mark for correct
working)
more than
21.5cm; (2
marks, 1 mark for correct answer, 1 mark for correct
working)
between 19.9cm and
20.1cm? (4
marks, 1 mark for correct answer, 3 marks for correct
working)
distributed with a mean length of 20cm and a standard deviation of
0.5cm. What is the probability that a randomly selected steel rod
will have a length that is:-
less than 19
cm; (2
marks, 1 mark for correct answer, 1 mark for correct
working)
more than
21.5cm; (2
marks, 1 mark for correct answer, 1 mark for correct
working)
between 19.9cm and
20.1cm? (4
marks, 1 mark for correct answer, 3 marks for correct
working)