Question

question 38
3 points
assume the data below came from a cross - sectional study. calcuate the overall prevalence of broken bones and round to 1 decimal point. do not put the % sign after your response when you report your answer.
mountain biker: broken bone = 19, no broken bone = 51, total = 70
not a mountain biker: broken bone = 5, no broken bone = 48, total = 53
total: broken bone = 24, no broken bone = 99, total = 123

Explanation:

Step1: Recall the formula for prevalence

Prevalence = $\frac{\text{Number of cases (broken bones)}}{\text{Total number of people}}$

Step2: Identify the values from the table

Number of cases (broken bones) = 24, Total number of people = 123

Step3: Calculate the prevalence

Prevalence = $\frac{24}{123}\approx0.1951$

Step4: Round to 1 decimal point

$0.1951\approx20.0$ (when expressed as a percentage without the % sign, since $\frac{24}{123}\times100\approx19.51$ and rounding to 1 decimal gives 19.5, but if we consider the non - percentage form as per the problem's instruction of "do not put the % sign", $\frac{24}{123}\approx0.195$ which is 19.5 when we want one decimal place for the proportion out of 1 (equivalent to percentage without the sign))

Answer:

19.5