Related InterviewSolutions

• Find the variance of the first 10 natural numbers.(a) 7.25(b) 7(c) 8.25(d) 8The question was asked in examination.Question is taken from Statistics in chapter Statistics of Mathematics – Class 11
• The mean of 5 observations is 3 and variance is 2. If three of the five observations are 1, 3, 5, find the other two.(a) 2, 6(b) 3, 3(c) 1, 5(d) 2, 4I had been asked this question in unit test.My query is from Statistics in section Statistics of Mathematics – Class 11
• If the S.D. is a set of observations is 4 and if each observation is divided by 4, find the S.D. of the new observations.(a) 4(b) 3(c) 2(d) 1I had been asked this question in an interview.This is a very interesting question from Statistics in section Statistics of Mathematics – Class 11
• What is the geometric mean of 5,5^2, ….,5^n?(a) 5^n/2(b) 5^(n+1)/2(c) 5^n(n+1)/2(d) 5^nThis question was addressed to me at a job interview.This intriguing question comes from Statistics in section Statistics of Mathematics – Class 11
• Find the mean deviation from mean of the observations: a, a+d, …., (a+2nd).(a) n(n + 1)d^2/3(b) n(n + 1)d^2/2(c) a + n(n + 1)d^2/2(d) n(n + 1)d/(2n + 1)I have been asked this question in an interview for job.This interesting question is from Statistics in division Statistics of Mathematics – Class 11
• If the standard deviation of a data is 820 and mean of the data is 50, find the coefficient of variation.(a) 16.4(b) 164(c) 1640(d) 1.64I got this question by my school teacher while I was bunking the class.Question is taken from Statistics in division Statistics of Mathematics – Class 11
• The change in which of following terms does not affect the standard deviation?(a) Origin(b) Scale(c) Origin and scale(d) Neither origin nor scaleI have been asked this question in an interview for job.My doubt stems from Statistics in division Statistics of Mathematics – Class 11
• If the standard deviation of the numbers 2, 4, 5 & 6 is a constant a, then find the standard deviation of the numbers 4, 6, 7 & 8.(a) a + 2(b) 2a(c) 4a(d) aI have been asked this question in my homework.This intriguing question originated from Statistics topic in division Statistics of Mathematics – Class 11
• Assuming the variance of four numbers w, x, y, and z as 9. Find the variance of 5w, 5x, 5y and 5z.(a) 225(b) 5/9(c) 9/5(d) 54The question was posed to me during an interview.Enquiry is from Statistics topic in division Statistics of Mathematics – Class 11
• A fisherman is weighing each of 50 fishes. Their mean weight worked out is 50 gm and a standard deviation of 2.5 gm. Later it was found that the measuring scale was misaligned and always under reported every fish weight by 2.5 gm. Find the mean and standard deviation of fishes.(a) 52.5,2.5(b) 30,5(c) 50,5(d) 48.5,2.5The question was asked during an interview for a job.My doubt stems from Statistics in chapter Statistics of Mathematics – Class 11