[ Multiple chose question. ]

- Q1.The difference between random errors and systematic errors is:- [ Select one. ]

a) Random errors result from a flaw in the measuring device, whereas systematic errors don't.

b) Systematic errors vary between measurement to measurement but random errors don't.

c) The standard deviation is used to estimate systematic errors while we use means to estimate random errors.

d) Random errors vary between measurement to measurement but systematic errors don't.

e) There is no difference between the two error types.

- Q2.What is the bias?- [ Select one. ]

a) It is the standard deviation of the measurement

b) It is the mean of the measurement

c) It is the difference between the mean and the true value

d) It is the random error we obtain when we repeatedly measure something

- Q3.The length of an aircraft part is measured as 81.20.181.20.1 cm. Which of the following is true?- [ Select more than one. ]

a) The length was measured to be 81.2 cm.

b) The true length of the part is 81.2 cm.

c) The bias in the measurement is 0.1 cm.

d) The uncertainty in the measurement is 0.1 cm.