Identify the statistical study that employs a population parameter: Four scenarios of statistical studies are given below. Decide which study uses a population parameter. Answer 2 Points Keypad Keyboard Shortcuts In $2001,78 \%$ of children diagnosed with cancer were in remission after five years, and this number is improving. Lakeside Family Dentistry reported that 6 of the 15 patients who came in for a regular cleaning one day had at least one cavity. $15 \%$ of the attendees at a town council meeting in a rural area reported not using the internet on a daily basis. 1000 of the 1883 participants in last year's Ironman in Kona, Hawail were interviewed. $68 \%$ of those interviewed said they became interested in triathlons after first competing in marathons.
Solution
Step 1 ：The question is asking to identify which of the given scenarios uses a population parameter. A population parameter is a characteristic or measure that can be used to describe an entire population. In the context of these scenarios, a population parameter would be a statistic that is used to describe all members of a certain group, not just a sample.
Step 2 ：Looking at the scenarios, the first one seems to be using a population parameter. It is stating a statistic about all children diagnosed with cancer in 2001, not just a sample. The other scenarios are all describing samples (e.g., 15 patients at a dentist office, attendees at a town council meeting, participants in a triathlon), not entire populations.
Step 3 ：The statistical study that employs a population parameter is: 'In 2001, 78% of children diagnosed with cancer were in remission after five years, and this number is improving.'
