Related Questions

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
Read the following information and answer the questions giver below it: *Seven students P,Q,R,S,T,U and V take a series of tests. *No two students get similar marks. *V always scores more than P. *P always scores more than Q. *Each time either R scores the highest and T gets the lest, or alternatively S scores the highest and U or Q scores the least. If S is ranked sixth and Q is ranked fifth, which of the following can be true ?
A V is ranked first or fourth
B R is ranked second or third
C R is ranked second or fifth
D V is ranked third or fourth
Read the following information and answer the questions giver below it: *Seven students P,Q,R,S,T,U and V take a series of tests. *No two students get similar marks. *V always scores more than P. *P always scores more than Q. *Each time either R scores the highest and T gets the lest, or alternatively S scores the highest and U or Q scores the least. If R is ranked second and Q is ranked fifth, which of the following must be true ?
A S is ranked third
B T is ranked sixth
C P is ranked sixth
D V is ranked fourth
Read the following information and answer the questions giver below it: *Seven students P,Q,R,S,T,U and V take a series of tests. *No two students get similar marks. *V always scores more than P. *P always scores more than Q. *Each time either R scores the highest and T gets the lest, or alternatively S scores the highest and U or Q scores the least. If S is ranked second, which of the following can be true ?
A U gets more than v
B V gets more than S
C P gets more than R
D P gets more than V
Read the following information and answer the questions giver below it: *Seven students P,Q,R,S,T,U and V take a series of tests. *No two students get similar marks. *V always scores more than P. *P always scores more than Q. *Each time either R scores the highest and T gets the lest, or alternatively S scores the highest and U or Q scores the least. If R gets most, V should be ranked not lower than--
A Second
B Third
C Fourth
D Fifth
Three maths classes: X, Y, and Z take an algebra test. The average score of class X is 83. The average score of class Y is 76. The average score of class Z is 85. The average score of class X and Y is 79 and the average score of class Y and Z is 81. What is the average score of the combined classes X, Y, and Z?
A 81
B 81.5
C 82
D 84.5
Three math classes , X, Y , and Z, take an algebra test. The average score in class X is 83. The average score in class Y is 76. The average score in class Z is 85. The average score of all students in classes X and Y together is 79. The average score of all student classes Y and Z together is 81. What is the average for all the three classes?
A 81
B 81.5
C 82
D 84.5
The batting average for 40 innings of a cricket player is 50 runs. His higest score in an innings exceeds his lowest score by 172 runs. if thse two innings are excluded, the average score of the remianing 38 innings is 48 runs . Find his highst score in an innings
A 180 runs
B 170 runs
C 174 runs
D 168 runs
Jamal's average score in 4 tests was 80 out of a possible 100 . If his scores in 2 of the tests were 65 and 70, what is the lowest that either of his other scores could have been ?
A 70
B 80
C 90
D 85
The average of several exam scores is 80. One make-up exam was given. Included with the other scores, the new average was 84. If the score on the make-up exam was 92, how many total exams were given?
A 3
B 2
C 4
D 5

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