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melissa9882
03.11.2020 •
Mathematics
Is y=4.2x + 3 proportional
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Ответ:
A. The probability that a person older than 35 years has a hemoglobin
level less than 9 is 76/162 or 0.47 (rounding to two decimal places)
B. The probability that a person younger than 25 years has a hemoglobin level above 11 is 69/139 or 0.50 (rounding to two decimal places).
C. The probability that a person in the 25–35 age group has a hemoglobin level less than 9 is 32/128 or 0.25.
D. The probability that a person older than 35 years has a hemoglobin level between 9 and 11 is 46/162 or 0.28 (rounding to two decimal places).
Step-by-step explanation:
1. Let's review the information given to solve these questions:
The people surveyed were grouped in three range of ages: less than 25 years , 25 to 35 years and over 35 years. Related to the hemoglobin level, the ranges were also three: less than 9, between 9 and 11 and above 11.
Total of persons surveyed = 429
Less than 25 surveyed = 139
Between 25 and 25 years old = 128
Older than 35 = 162
From the less than 25 surveyed people, 21 had hemoglobin less than 9, 49 between 9 and 11 and 69 had above 11 of hemoglobin level.
From the 25 to 35 surveyed people, 32 had hemoglobin less than 9, 52 between 9 and 11 and 44 had above 11 of hemoglobin level.
Finally, from the group of people above 35 years, 76 had hemoglobin less than 9, 46 between 9 and 11 and 40 had above 11 of hemoglobin level.
2. Now let's drag the tiles to the correct boxes to complete the pairs.
A. The probability that a person older than 35 years has a hemoglobin
level less than 9 is 76/162 or 0.47 (rounding to two decimal places)
B. The probability that a person younger than 25 years has a hemoglobin level above 11 is 69/139 or 0.50 (rounding to two decimal places).
C. The probability that a person in the 25–35 age group has a hemoglobin level less than 9 is 32/128 or 0.25.
D. The probability that a person older than 35 years has a hemoglobin level between 9 and 11 is 46/162 or 0.28 (rounding to two decimal places).