In a study to determine relationship between presence of I.H.D and smoking, the appropriate
Statistical test is:
(a) z-test (b) Paired‘t’ test (c) Chi-square test (d) None of the above

2. Of the 140 children, 20 lived in owner occupied houses, 70 lived in council houses and 50 lived in
private rented accommodation. Type of accommodation is a categorical variable. Appropriate graphical
presentation will be
(a) Line chart (b) Simple Bar chart (c) Histogram (d) Frequency Polygon

1) whichone of the following is used to representing qualitative data?

a) histogram, b) polygon, c) pie chart, d) line chart