Subject
Quantitative Aptitude
Topic
Average
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 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?
ক)
The mean onlyখ)
The median onlyগ)
The standard deviation onlyঘ)
The mean and the medianExplanation
If we add or subtract a constant to each term in a set the standard deviation will not change.. If we add (or subtract) a constant to each term in a set the mean and the median will increase (decrease) by the value of that constant.Related questions
If the average of 8, 11, 25, and p is 15 then 8+11+25+p = ?An EMBA student receives grades 78, 80, 82 and 84 in four subjects. If he/she wants to maintain an average of 80 how much he /she should get in the fifth subject?Sum of P and Q is 72 and the value of R is What is the average of P, Q and R?A student was asked to find the arithmetic mean of the numbers 3, 11, 7, 9, 15, 13, 8, 19, 17, 21, 14 and x. He found the mean to be 12. What should be the number in place of x ?The captain of a cricket team of 11 members is 26 years old and the wicket keeper is 3 years older. If the ages of these two are excluded, the average age of the remaining players is one year less than the average age of the whole team. What is the average age of the team?If the simple average of four numbers k, 2k+3, 3k-5, and 5k +1 is 63, what is the value of k?কামাল,জামাল এবং সালাম এর দৈনিক আয় একত্রে ৯০ টাকা । যদি জামাল কামালের চেয়ে ১০ টাকা বেশি আয় করে এবং সালামের আয় জামালের আয়ের দ্বিগুন হয়,তবে কামাল ও জামালের আয়ের গড় কত ?A certain factory employed 600 men and 400 women and the average wager was Rs. 25.50 per day, If a woman got Rs. 5 less than a man, then what are their daily wages ?