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तमिलनाडु बोर्ड ऑफ सेकेंडरी एज्युकेशनएसएसएलसी (अंग्रेजी माध्यम) कक्षा ९

The algebraic sum of the deviations of a set of n values from their mean is

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प्रश्न

The algebraic sum of the deviations of a set of n values from their mean is

विकल्प

  • 0

  • n – 1

  • n

  • n + 1

MCQ
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उत्तर

The algebraic sum of the deviations of a set of n values from their mean is 0

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  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 8: Statistics - Exercise 8.4 [पृष्ठ २८८]

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सामाचीर कलवी Mathematics [English] Class 9 TN Board
अध्याय 8 Statistics
Exercise 8.4 | Q 5 | पृष्ठ २८८

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The calculated mean of 50 observations was 80. It was later discovered that observation 19 was recorded by mistake as 91. What was the correct mean?


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In a research laboratory scientists treated 6 mice with lung cancer using natural medicine. Ten days later, they measured the volume of the tumor in each mouse and given the results in the table

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Tumor Volume (mm3) 145 148 142 141 139 140

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The mean of 5, 9, x, 17 and 21 is 13, then find the value of x


The marks of 14 students in a science test out of 50 are given below. 34, 23, 10, 45, 44, 47, 35, 37, 41, 30, 28, 32, 45, 39 Find the mean mark


The mean height of 11 students in a group is 150 cm. The heights of the students are 154 cm, 145 cm, Y cm, Y + 4 cm, 160 cm, 151 cm, 149 cm, 149 cm, 150 cm, 144 cm and 140 cm. Find the value of Y and the heights of two students?


Which measures of central tendency get affected if the extreme observations on both the ends of a data arranged in descending order are removed?


The following are weights (in kg) of 12 people.

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