Common questions

Does high reliability mean high validity?

Does high reliability mean high validity?

Validity refers to how accurately a method measures what it is intended to measure. If research has high validity, that means it produces results that correspond to real properties, characteristics, and variations in the physical or social world. High reliability is one indicator that a measurement is valid.

Is the c5 still in service?

The C-5M Super Galaxy strategic transport aircraft, a modernised version of the legacy C-5, was designed and manufactured by Lockheed Martin to extend the capability of the C-5 Galaxy fleet to remain in service at least until 2040. The C-5M aircraft is operated by the US Air Force (USAF).

Is it possible to have a test with high validity but low reliability?

Finally, it is not possible to have a measure that has low reliability and high validity – you can’t really get at what you want or what you’re interested in if your measure fluctuates wildly.

What are some examples of validity?

The concept of validity was formulated by Kelly (1927, p. 14) who stated that a test is valid if it measures what it claims to measure. For example a test of intelligence should measure intelligence and not something else (such as memory).

How many C5 galaxies have crashed?

Three C-5 Galaxy aircraft have been lost in crashes along with two class-A losses resulting from ground fire, with a combined total of 169 fatalities. At least two other C-5 crashes have resulted in major airframe damage, but the aircraft were repaired and returned to service.

Which is bigger C5 or Antonov?

In a final comparison, the Antonov AN-124 is physically larger, allowing for larger payload capacity, while the Lockheed C-5 Galaxy has a much longer range. The aircraft has a maximum take-off weight of 265.3 tons and payload capacity of 74,797kg [74.8 tons].

How is the reliability of a measurement related to its validity?

Reliability and validity are closely related, but they mean different things. A measurement can be reliable without being valid. However, if a measurement is valid, it is usually also reliable. What is reliability?

How is the reliability of an instrument assessed?

Reliability of the instrument can be evaluated by identifying the proportion of systematic variation in the instrument. On the other hand, the validity of the instrument is assessed by determining the degree to which variation in observed scale score indicates actual variation among those being tested.

Do you believe that something must be reliable?

Some individuals believe that if something is reliable, it must be valid, this is not true. This blog aims to illustrate why it is not and also evaluate the effectiveness of testing Reliability and Validity.

What’s the difference between a C-5 and a C 5B?

The C-5A and C-5B/C fleets are now slated for different treatment, which will deliver fewer of the hoped-for benefits, in exchange for lower costs and lower risk. KC-135 = 707 airliner!