The following frequency distribution analyzes the scores on a math test. A nurse

Question

The following frequency distribution analyzes the scores on a math test. A nurse measured the blood pressure of each person who visited her clinic. Following is a relative-frequency histogram for the systolic blood pressure readings for those people aged between 25 and 40. The blood pressure readings were given to the nearest whole number: Number of 2 6 s tuden ts CoreS 40-59 60-25 76-82 83-94 95-99 Find the lower class boundary of the last class Relative Frequency 15 0.35 0.30 0.25 0.20 0.15 0.10 0.05 0.00 94.5 #1 o 95 94.9 none of the above Find the original data from the stom-and-leaf plot: Stem Leaves 100 110 120 130 140 150 160 Systolic Blood Pressure (mm Hg pproximately what percentage of the people aged 25-40 had a systoic blood pressure reading between 110 and 119 inclusive 73 74 75, 78, 79, 76. 76, 81, 75, 81 338 17 #2 30% o 3.5% o 0.35% o 35% #3 723, 726, 727, 733, 733, 738, 741,747 72367, 73338, 7417 723, 726, 737, 733, 733, 738, 741, 757

Explanation / Answer

Solution1:

last class is

95-99

lower limit=95

upper limit=99

ANSWER:

LOWER LIMIT=95

option 2

Solution2:

stem is 72

723,726,727

stem is 73

733,733,738

stem is 74

741 ,747

given data is

723,726,727,733,733,738,741 ,747

option 2

Solution3:

for 110-119 rel fre from histogram is

0.35

=0.35*100=35%

ANSWER:35%

OPTION D

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