Related Questions

If the standard deviation of a population is 7, what would be the population variance?
A 14
B 21
C 49
D 28
If the standard deviation of a population is 4.5, what would be the population variance?
A 20.25
B 20
C 9
D 18
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 certain city with population of 132,000 is to be divided into 11 voting districts and no district is to have population that is more than 10 percent greater than the population of any other district. What is the minimum possible population that the least population district could have?
A 11000
B 10900
C 11100
D 10700
City X has a population 4 times as grate as the population of city Y, Which has a populatin twice as grat as the population of city Z. What is the ratio of the population of city X to the population of city Z?
A 1:8
B 1:4
C 2:1
D 8:1
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
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
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 population of Barisal is 50 percent of the population of Chittagong. The population of Barisal is what percent of the total population of Baisal and Chittagong?
A 25%
B 3313%
C 40%
D 50%

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