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The class mark of the C.I.'s 10-19, 20-29, 30-39 are
- a)15, 25, 35
- b)30, 50, 70
- c)14.5, 24.5, 34.5
- d)None of these
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
The class mark of the C.I.'s 10-19, 20-29, 30-39 area)15, 25, 35b)...
Class-mark =LCL+UCL/2=10+19/2=14.5 Same for other
class interval so the answer is 14.5,24.5,34.5.
class interval so the answer is 14.5,24.5,34.5.
Most Upvoted Answer
The class mark of the C.I.'s 10-19, 20-29, 30-39 area)15, 25, 35b)...
Class mark = lower limite+ upper limit÷2
( 10+19)÷2=14.5
(20+29)÷2=24.5
(30+39)÷2=34.5
( 10+19)÷2=14.5
(20+29)÷2=24.5
(30+39)÷2=34.5
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Community Answer
The class mark of the C.I.'s 10-19, 20-29, 30-39 area)15, 25, 35b)...
Explanation:
To find the class mark of a given class interval, we need to find the midpoint of the upper and lower class limits. The class mark is a measure of the central tendency of the class interval.
Given CI: 10-19, 20-29, 30-39
We need to find the class marks for each of these intervals.
Step 1: Identify the lower and upper class limits of each interval.
CI 1: 10-19
Lower class limit = 10
Upper class limit = 19
CI 2: 20-29
Lower class limit = 20
Upper class limit = 29
CI 3: 30-39
Lower class limit = 30
Upper class limit = 39
Step 2: Calculate the class mark for each interval.
The class mark is calculated as the average of the lower and upper class limits.
CI 1: 10-19
Class mark = (Lower class limit + Upper class limit) / 2
= (10 + 19) / 2
= 29 / 2
= 14.5
CI 2: 20-29
Class mark = (Lower class limit + Upper class limit) / 2
= (20 + 29) / 2
= 49 / 2
= 24.5
CI 3: 30-39
Class mark = (Lower class limit + Upper class limit) / 2
= (30 + 39) / 2
= 69 / 2
= 34.5
Therefore, the class marks for the given class intervals are 14.5, 24.5, 34.5.
Hence, the correct answer is option 'C' (14.5, 24.5, 34.5).
To find the class mark of a given class interval, we need to find the midpoint of the upper and lower class limits. The class mark is a measure of the central tendency of the class interval.
Given CI: 10-19, 20-29, 30-39
We need to find the class marks for each of these intervals.
Step 1: Identify the lower and upper class limits of each interval.
CI 1: 10-19
Lower class limit = 10
Upper class limit = 19
CI 2: 20-29
Lower class limit = 20
Upper class limit = 29
CI 3: 30-39
Lower class limit = 30
Upper class limit = 39
Step 2: Calculate the class mark for each interval.
The class mark is calculated as the average of the lower and upper class limits.
CI 1: 10-19
Class mark = (Lower class limit + Upper class limit) / 2
= (10 + 19) / 2
= 29 / 2
= 14.5
CI 2: 20-29
Class mark = (Lower class limit + Upper class limit) / 2
= (20 + 29) / 2
= 49 / 2
= 24.5
CI 3: 30-39
Class mark = (Lower class limit + Upper class limit) / 2
= (30 + 39) / 2
= 69 / 2
= 34.5
Therefore, the class marks for the given class intervals are 14.5, 24.5, 34.5.
Hence, the correct answer is option 'C' (14.5, 24.5, 34.5).
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The class mark of the C.I.'s 10-19, 20-29, 30-39 area)15, 25, 35b)30, 50, 70c)14.5, 24.5, 34.5d)None of theseCorrect answer is option 'C'. Can you explain this answer?
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