Related Questions

The mean of a distribution is 15 and the standard deviation is 5. What is the value of the coefficient variation?
A 16.66%
B 66.66%
C 33.33%
D 100%
একজন চাকরিজীবীর আয় ও ব্যয়ের অনুপার ২০ঃ ১৫ হলে, তার মাসিক সঞ্চয় আয়ের শতকরা কত অংশ?
A ৩০%
B ১৫%
C ২০%
D ২৫%
একটি ট্রান্সফরমারের প্রাইমারি ও সেকেন্ডারি তারের ঘূর্ণনের অনুপাত 20ঃ 1 এবং সেকেন্ডারিতে 20 omega রোধ লাগানো আছে। যদি প্রাইমারিতে 220 V প্রয়োগ করা হয় তাহলে এর মধ্যে বিদ্যুৎ প্রবাহ হবে-
A 0.55 A
B 27.5 mA
C 27.5 A
D 5.5 mA
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

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