2. Here is a chart of blood pressure (in millimetres of mercury, mmHg) for a group of students:

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2.
Here is a chart of blood pressure (in millimetres of mercury, mmHg) for a group of
students:
Class Interval
Frequency
90 to under 105
24
105 to under 120
62
120 to under 135
72
135 to under 150
26
150 to under 165
12
165 to under 180
4
Calculate:
c) 9th decile
d) the percentile ranks for blood pressure of 150
Transcribed Image Text:2. Here is a chart of blood pressure (in millimetres of mercury, mmHg) for a group of students: Class Interval Frequency 90 to under 105 24 105 to under 120 62 120 to under 135 72 135 to under 150 26 150 to under 165 12 165 to under 180 4 Calculate: c) 9th decile d) the percentile ranks for blood pressure of 150
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