Question

True lengths of 5 cut pieces of string having these length in inches: 2.9, 9.5,5.7,4.2,7.6

A subject measure each length twice by eye. Make up a set of results from this activity that matches each of the description below. For simplicity, assume that bias means the same fixed error every time rather than an "on average" error in many measurements.

Q: The subject has a bias of 0.5 inches too long is perfectly reliable

Answer 1

[measure length= true length + bias + random error]

Answer 2

measuring length by eye is strange

Answer 3

not sure but would it just be measure value= 2.9+0.5+0 thus solving for measure value it would be 2.4 the set of new results then would be 2.9,9.0, 5.7, 3.7, 7.1?

Answer 4

i dont really understand the wording of the question,

Answer 5

using the true value of the 5 pieces of cut string 2.9, 9.5, 5.7, 4.2, 7.6 which are all in inches it says create a new set of numbers if the subject has a bias of 0.5 inch too long and is perfectly reliable

Answer 6

1. A student cuts five pieces of string having the following lengths in inches: 2.9, 9.5, 5.7, 4.2, 7.6 Then the students showed the pieces to another student one at a time, asking the subject to estimate the length to the nearest tenth of an inch by eye. The error made by the subject is measured value minus true value and can be either positive or negative.

What will be the results obtained from the subject, if the subject has a bias of 0.5 inch too long and is perfectly reliable?

Choose one:

A. 3.4, 10.0, 6.2, 4.7, 8.1
B. 3.4, 10.1, 6.3, 4.6, 8.6
C.2.4, 9.0, 5.2, 3.7, 7.1

Answer 7

ah , so the bias is 0.5 too long you have to add 0.5 to each measurement

2.9, 9.5, 5.7, 4.2, 7.6

\(\to\)2.9+0.5, 9.5+0.5, 5.7+0.5, 4.2+0.5, 7.6+0.5