Question

This two-way frequency table gives the results of a screening test for heart disease conducted by determining the cholesterol level in the blood
samples of 750 patients.
Question 1
Using the two-frequency table, compute the probability of having high cholesterol. Or Phigh cholesterol)

Answer 1

Answer:

The probability of having high cholesterol = 0.496

Step-by-step explanation:

Given frequency data table

                                                         cholesterol level

                                          Normal           High              Total

Heart diseases      Yes       11                   223                  234

                               No       367                149                   516

                             Total        378               372                 750

Given data

The Cholesterol level is high  n ( High cholesterol) = 372

Total n( S) = 750

The probability of having high cholesterol level

                           P( E) = $\frac{n(E)}{n(S)} = \frac{372}{750} = 0.496$