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. If sum of squares of the values = 3390, N = 30 and standard deviation = 7, find out the mean. (a) 113 (b) 210 (c) 8 (d) None of these?
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. If sum of squares of the values = 3390, N = 30 and standard deviatio...
Solution:
Given, sum of squares of the values = 3390, N = 30 and standard deviation = 7
We know that the formula for variance is
Variance (σ^2) = (Σx^2/N) - (μ^2)
where Σx^2 is the sum of squares of the values, N is the number of values, μ is the mean.
So, substituting the given values, we get
σ^2 = (Σx^2/N) - (μ^2)
7^2 = (3390/30) - (μ^2)
49 = (113 - μ^2)
μ^2 = 113 - 49 = 64
μ = √64 = 8
Therefore, the mean is 8.
Answer: (c) 8
Given, sum of squares of the values = 3390, N = 30 and standard deviation = 7
We know that the formula for variance is
Variance (σ^2) = (Σx^2/N) - (μ^2)
where Σx^2 is the sum of squares of the values, N is the number of values, μ is the mean.
So, substituting the given values, we get
σ^2 = (Σx^2/N) - (μ^2)
7^2 = (3390/30) - (μ^2)
49 = (113 - μ^2)
μ^2 = 113 - 49 = 64
μ = √64 = 8
Therefore, the mean is 8.
Answer: (c) 8
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. If sum of squares of the values = 3390, N = 30 and standard deviation = 7, find out the mean. (a) 113 (b) 210 (c) 8 (d) None of these?
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. If sum of squares of the values = 3390, N = 30 and standard deviation = 7, find out the mean. (a) 113 (b) 210 (c) 8 (d) None of these? for CA Foundation 2024 is part of CA Foundation preparation. The Question and answers have been prepared according to the CA Foundation exam syllabus. Information about . If sum of squares of the values = 3390, N = 30 and standard deviation = 7, find out the mean. (a) 113 (b) 210 (c) 8 (d) None of these? covers all topics & solutions for CA Foundation 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for . If sum of squares of the values = 3390, N = 30 and standard deviation = 7, find out the mean. (a) 113 (b) 210 (c) 8 (d) None of these?.
. If sum of squares of the values = 3390, N = 30 and standard deviation = 7, find out the mean. (a) 113 (b) 210 (c) 8 (d) None of these? for CA Foundation 2024 is part of CA Foundation preparation. The Question and answers have been prepared according to the CA Foundation exam syllabus. Information about . If sum of squares of the values = 3390, N = 30 and standard deviation = 7, find out the mean. (a) 113 (b) 210 (c) 8 (d) None of these? covers all topics & solutions for CA Foundation 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for . If sum of squares of the values = 3390, N = 30 and standard deviation = 7, find out the mean. (a) 113 (b) 210 (c) 8 (d) None of these?.
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