Biostatistics Quiz

What is the first step in organizing data according to the text?

• Preparation of a cumulative frequency

• Preparation of a frequency distribution

• Preparation of an ordered array

• Preparation of a histogram

What is the maximum hemoglobin level recorded in the sample of 50 men?

• 18.3

• 17.8

• 17.0

• 17.5

How many class intervals are used to summarize the hemoglobin levels?

• 7

• 4

• 6

• 5

What is the mid-point of the class interval 15.0 – 15.9?

• 15.45

• 15.95

• 15.25

• 15.55

What is the cumulative frequency of the class interval 16.0 – 16.9?

• 23

• 39

• 32

• 16

What is the relative frequency of the class interval 14.0 – 14.9?

• 0.30

• 0.20

• 0.06

• 0.10

Which graph is NOT mentioned for displaying grouped frequency distributions?

• Frequency Polygon

• Histogram

• Pie Chart

• Bar Graph

What is the percentage frequency of the class interval 17.0 – 17.9?

• 20%

• 30%

• 10%

• 32%

What is the total sample size (n) of the hemoglobin level data?

• 50

• 30

• 100

• 60

What is the true lower limit of the class interval 14.0 – 14.9?

• 13.95

• 14.2

• 14.0

• 14.5