The blood pressure data of 200 persons were collected. The first quaile BP of the data was 94 mm Hg and third quaile was 110 mm. How many patients have blood pressures between the 3rd and 4th quaile?
25
50
100
200
Ans: B. 50Quaile:Type of quantile.In descriptive statistics - Quailes are ranked set of data values.Are 3 points dividing data set into four equal groups.Each group comprising quaer of data.1stquaile (Q1):25' percentile (splits off lowest 25% of data from highest 75%).2ndquaile (Q2):50' percentile (cuts data set in half).3rdquaile (Q3):75" percentile (splits off highest 25% of data from lowest 75%).Interquaile range (IQR):Difference between upper & lower quailes.IQR = Q3 - Q1.Per question:Between every two quailes one/ fouh of total number of patients present.I.e. 200/4 = 50 patients.