Related Questions

The mean of a distribution is 20 and the standard deviation is 4. What is the value of the coefficient variation?
A 10%
B 20%
C 40%
D 60%
যদি একটি বিন্যাসের গড় 10 এবং বিভেদাঙ্ক 40% হয়, তাহলে বিন্যাসটির ভেদাঙ্ক কত হবে? ( If the mean of a distribution is 10 and the coefficient of variation is 40%, then what is the variance of the distribution?)
A 36
B 4
C 25
D 252
ঝুঁকি পরিমাপের পদ্ধতি হলো- i. আদর্শ বিচ্যুতি (Standard deviation) ii. সম্ভাবনা বিন্যাস (Probability distribution) iii. বিভেদাংক (Co-efficient of Variation) নিচের কোনটি সঠিক?
A i ও ii
B i ও iii
C ii ও iii
D i ii ও iii
A,B,C,D,E,G and I are seven friends who study in three different standards namely 5th, 6th and 7th such that not less than two friends study in the same standard. Each friend also has a different favorite subject namely History, Civics, English, Bangla, Science , Maths , and Economics but not necessarily in the same order. A likes Maths and studies in the 5th standard with only one other friend who likes Bangla. I studies with tow other friends . Both the friends who study with I like languages (Here languages include only Science , English and Bangla ) . D studies in the 6th standard with only one person and does not like Civics . E studies with only one friend . The one who likes history does not study in 5th or 6th standard . E does not like languages. C does not like English , Science or Civics. Which combination represents E's favorite subject and the standard in which he studies?
A Civics and 7th
B Economics and 5th
C Civics and 6th
D History and 7th
A researcher computed the mean , median and standard deviation for a set of performance score . If 5 were to be added to each score , which of these three statistics would change ?
A The mean only
B The median only
C The standard deviation only
D The mean and median only
A researcher computed the mean, the median and the standard deviation for a set of performance scores. If 5 were to be added to each score, which of these three statistics would change?
A The mean only
B The median only
C The standard deviation only
D The mean and the median
The ratio of maximum displacement deviation to full scale deviation of the instrument is called
A static sensitivity
B dynamic deviation
C linearity
D precision or accuracy
The variation in the volume of a liquid with the variation of pressure is called its
A Surface tension
B Compressibility
C Capillarity
D Viscosity
Value, which measures that how large is value of standard error in relevance to value of estimated coefficient is termed as
A t-value
B b-value
C d-value
D c-value
If Michael can shovel all the snow of a standard driveway in 12 minutes, and Emon can shovel all the snow of a standard driveway in 36 minutes, then working together, how many minutes would it take for them both to shovel all the snow of a standard driveway?
A 5
B 9
C 15
D 18

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