In a study designed to test the effectiveness of magnets for treating back pain, 20 patients were given a treatment with magnets. Pain was measured using the VAS scale. The average VAS reading of the sample was 5.0 with a standard deviation of 2.9. Construct a 95% confidence interval of the true mean.
Z D/2 = 2.09

p ÷ r = tan(x)

step-by-step explanation:

given that there is a figure below shows a right triangle: a right triangle is shown with hypotenuse equal to q units and the length of the legs equal to p units and r units.

graph is missing so i will create the graph as per given information.

the angle between the legs having lengths p units and q units is y degrees. the angle between the legs having lengths r units and q units is x degrees.

now we need to find about what is p ÷ r equal to.

so we can use trigonometric ratio tan(x)=[altitude]/[base] to find the value of p ÷ r, because p is the altitude and r is the base.

p ÷ r=tan(x)

hence final answer is p ÷ r=tan(x).