Validity part 2

What is base rate?

What is selection rate?

The ________ the base rate the lower the sensitivity.

• Higher

• Lower

• None of the above

In what case is sensitivity lower in relation to base rate?

Why is sensitivity low when base rate is higher?

Answer explanation

Because no matter how many people possess the characteristic if the selection rate stays the same than the people who could have gotten selected because they possess the characteristic will get rejected.

The lower the base rate the __________ the specificity.

• Higher

• Lower

• None of the above

The _________ the base rate the __________ the sensitivity. The _________ the base rate, the ________ the specificity.

• Lower, higher, lower, higher

• Higher, lower, lower, higher

• Higher, lower, lower, lower

• Lower, higher, lower, lower

The _________ the selection rate the __________ the sensitivity. The _________ the selection rate, the ________ the specificity.

• Lower, higher, lower, higher

• Higher, lower, lower, higher

• Higher, lower, lower, lower

• Lower, higher, lower, lower

• Lower, lower, higher, lower

Why is specificity lower when base rate is lower?

Answer explanation

Because there isn't enough people to fill in the quota meaning that someone who doesn't have the characteristic will be picked to fill up the available place.

What cause is the following explanation related to?

Because there isn't enough people to fill in the quota meaning that someone who doesn't have the characteristic will be picked to fill up the available place.

• Lower base rate, higher sensitivity

• Lower base rate, lower specificity

• Higher base rate, lower sensitivity

• Higher selection rate, lower specificity

• Lower selection rate, lower sensitivity