Mean and variance
= np (p+q) n - 1 ..
= np (p+q) n - 1 ..Which of the following is/are true? I. The mean value of F is approxim..
Which of the following is/are true? I. The mean value of F is approximately zero. II. F distribution is a family of curves based on the degrees of freedom of the variance of the numerator. III. F distribution is a family of curves based on the degrees of freedom of the..
Find the mean, variance and standard deviation for the number of heads..
Find the mean, variance and standard deviation for the number of heads, when 20 coins are tossed. => 10, 5, 5 or 5, 5 2 , 5 2 or 10, 5 , 5 or 5, 5 2 , 5 2..
The Zero Vector and its Properties
The Zero Vector and its Properties - Zero vector or null vector is a vector which has zero magnitude and an arbitrary direction. It is represented by . If a vector is multiplied by zero, the result is a zero vector. It is important to note that we c..
The Zero Vector and its Properties - Zero vector or null vector is a vector which has zero magnitude and an arbitrary direction. It is represented by . If a vector is multiplied by zero, the result is a zero vector. It is important to note that we c..The number of vehicles that crossed at a traffic junction per minute a..
The number of vehicles that crossed at a traffic junction per minute at different intervals are: 120, 138, 127, 135, 132, 124, 130, 134. Find the mean and variance. => Mean = 138; Variance = 31.7 or Mean = 130; Variance = 22.3 or Mean..
In a school, 40% of the students play basketball. If 400 students are ..
In a school, 40% of the students play basketball. If 400 students are selected at random, then find the mean and variance of the number of students who play basketball. => 160, 9.8 or 96, 160 or 96, 9.8 or 160, 96..
The means of each group of a two-way analysis of variance for two inde..
The means of each group of a two-way analysis of variance for two independent variables are plotted and shown in the three graphs. Which of these represents an ordinal interaction? Consider the interaction to be significant. => Graph 2 or Both graph 1 and graph 2 or Graph 3 or G..
Average Life or Mean Life
Not all atoms of a given sample disintegrate together. Some atoms disintegrate right in the beginning for which the lifetime is zero. Therefore the lifetime of atoms, which disintegrate in between, ranges from zero to infinity...
Not all atoms of a given sample disintegrate together. Some atoms disintegrate right in the beginning for which the lifetime is zero. Therefore the lifetime of atoms, which disintegrate in between, ranges from zero to infinity...30% of the death cases in a hospital are caused by accidents. If 250 c..
30% of the death cases in a hospital are caused by accidents. If 250 cases are selected at random, then find the mean, variance and standard deviation of the number of death cases caused by accidents. => 75, 7.24, 52.5 or 52.5, 75, 7.24 or 7.25, 52.5, 75 or 75, 52.5, 7.24..
10% of students in a school are left-handed. If 350 students are selec..
10% of students in a school are left-handed. If 350 students are selected at random, then find the mean, variance, and standard deviation of the number of students who are left-handed. => 40, 36, 6 or 5.61, 31.5, 35 or 35, 31.5, 5.61 or 31.5, 35, 5.61..
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