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#1
04-25-2015
 USMLE Forums Scout Steps History: CK+CS Posts: 12 Threads: 13 Thanked 1 Time in 1 Post Reputation: 11
epidemiology qustion, do we calculate mean?

A pediatric geneticist is working on a case series about a rare pulmonary disorder. From her literature review, she discovered eight cases of children who had the condition. In addition, two of her patients with the condition recently died. When comparing her patients to the general population, all 10 lived 9, 10, 10, 11, 12, 12, 12, 13, 26, and 36 months, respectively. She was astounded that her two patients (with a longevity of 26 and 36 months) had far outlived the other eight patients.
The doctor plotted the longevity of the children on a histogram to study the condition further. The data most likely resemble which type of statistical distribution?
• postiive skewed
• negative skewed
• normal distribution
• bimodal

#2
04-25-2015
 USMLE Forums Addict Steps History: Step 1 Only Posts: 142 Threads: 27 Thanked 51 Times in 33 Posts Reputation: 61

I think positive skewed. The mean is 14.2 and median is 12. So mean is greater than median, which leads to positive skewness.
#3
04-29-2015
 USMLE Forums Scout Steps History: 1 + CS Posts: 10 Threads: 0 Thanked 0 Times in 0 Posts Reputation: 10

That's interesting. Thankyou. I've been reading much on data interpretation of late and, along with the relatively recent movement to Bayesian inference, companies such as datapine are making it easier than ever for us to interpret data in new ways. Their dashboard creator is perfect for taking large chunks of data and displaying it in intuitive and instantly accessible ways. It's so simple to use and I've recorded some terrific result up to now - give it a try.

Last edited by lightus; 04-30-2015 at 07:09 AM.

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