Information given:- Several engineers joined and left Company Z in a year
- Among engineers who left within their first year, 18% held an agile project management certification
- Only 8% of all engineers reported having that certification
- Therefore, possessing the certification appears to make an engineer more likely to leave within a year
Question:- Which statement, if true, most seriously weakens the conclusion that having the certification makes it more likely an engineer will leave within a year?
Solution:- A: Most engineers who leave company Z within their first year do so voluntarily, often for positions at competing firms.
- Just explains why they leave, but doesn't break the certificate-leaving link, invalid
- B: Company Z does not provide incentives for employees to obtain professional certifications.
- Does not impact the link between having the certificate and leaving, invalid
- C: Engineers are not required to report certifications they obtained prior to joining the company.
- If true, the '8% of all engineers' number could be much higher, so the difference between 18% and 8% may not exist
- Directly attacks the reliability of the data, strong weakener, valid
- D: The majority of engineers at company Z work in teams that use agile methodologies.
- Does not affect the correlation between certification and leaving, invalid
- E: Some engineers obtain their agile project management certification only after joining the company.
- Suggests reverse causation (they get the certificate because they plan to leave). Weakens, but does not invalidate the numbers, invalid
Answer: C, Engineers are not required to report certifications they obtained prior to joining the company.Bunuel
In a recent calendar year, several engineers both joined and left Company Z. Among engineers who left within their first year of employment, 18 percent held an agile-project-management certification. Yet only 8 percent of all engineers who completed the annual HR survey reported holding that certification. Therefore, possessing the certification appears to make an engineer more likely to leave Company Z within a year of being hired.
Which of the following, if true, most seriously weakens the argument?
(A) Most engineers who leave company Z within their first year do so voluntarily, often for positions at competing firms.
(B) Company Z does not provide incentives for employees to obtain professional certifications.
(C) Engineers are not required to report certifications they obtained prior to joining the company.
(D) The majority of engineers at company Z work in teams that use agile methodologies.
(E) Some engineers obtain their agile project management certification only after joining the company.