\(\overline{X}\) = A + \(\frac{∑f_id_i}{∑f_i}\) is the formula to find mean for an ungrouped data. In this formula letter A represents for
A) Assumed mean
B) Arithmetic mean
C) Frequency
D) Deviation value
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Find the mean deviation about the mean for the following data : Find the mean deviation about the mean for the following data : 7,8,4,13,9,5,16,18
Correct Answer - 4.25
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Find the mean deviation about the mean for the following data : 39,72,48,41,43,55,60,45,54,43
Correct Answer - 6.2
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In an ungrouped data there are 10 scores. After arranging them which term is the median?
Correct option is (A) Average of nth/2 term and (n/2 + 1)th term n = 10 = even \(\therefore\) Median = Average of \(\frac{n}{2}th\) and \((\frac{n}{2}+1)th\) terms.
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In an ungrouped data there are 10 scores. After arranging them which term is the median?
2 Answers
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For an ungrouped data of 10 scores Arithmetic mean is 12. If one more socre is joined to the previous scores
C) Harsha and Ritu are correct.
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X = A + ∑fidi/∑fi is the formula to find mean for an ungrouped data. In this formula letter A represents for
Correct option is (A) Assumed mean In formula \(\overline X = A + \frac{\sum f_i d_i}{\sum f_i} ,\) letter A represents for assumed mean.
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In the formula, X = ∑xi/n the letter X represents
Correct option is (D) Mean of observations In the formula \(\overline X=\frac{\sum x_i}{n},\) the letter \(\overline X\) represents mean of the observation.
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In the formula, X = ∑xi/n the letter X represents
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A letter is chosen at random from the word “ROSE”. Find the probability, that the letter chosen is a vowel.
Correct option is (C) 1/2 R & S are consonant and 0 & E are vowels in word ROSE. Total number of letters in ROSE is n(S) = 4 Total vowel letters in ROSE...
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