Question

phantom pain is pain that feels as if it is coming from a body part that has been removed. to better understand phantom pain, scientists sometimes ask people who have had amputations to describe their experiences.
in one study, scientists asked people with limb amputations how often they experienced phantom pain. the table below shows their responses.

frequency of phantom pain	number of people
sometimes	534
always	193

source data: ephraim, p. l., et al. phantom pain, residual limb pain, and back pain in amputees: results of a national survey. in archives of physical medicine and rehabilitation. copyright 2005 by elsevier inc.
which of the following statements describes the results of this study? select all that apply.

• less than 50% of the people never felt phantom pain.
• more than 25% of the people felt phantom pain all the time.
• more than 75% of the people felt phantom pain at least some of the time.

Explanation:

Step1: Calculate total people

Total = 183 + 534 + 193 = 910

Step2: Check first statement

% never = $\frac{183}{910} \approx 20.1\% < 50\%$ (true)

Step3: Check second statement

% always = $\frac{193}{910} \approx 21.2\% < 25\%$ (false)

Step4: Check third statement

% at least sometimes = $\frac{534+193}{910} = \frac{727}{910} \approx 80\% >75\%$ (true)

Answer:

Less than 50% of the people never felt phantom pain., More than 75% of the people felt phantom pain at least some of the time.