# Practice Test

Q1) A Good measure of Central tendency should be Show Answer

Q2) For symmetrical distribution the following relationship is true: Show Answer

Q3) In case of extreme values the best measures of Central Tendency is Show Answer

Q4) The purpose of an average is to find: Show Answer

Q5) The best measure of average to find the average speed is Show Answer

Q6) Incase of qualitative data the best measures is Show Answer

Q7) Incase of grouped data when the last class interval is "80 & above" the best measure of average is Show Answer

Q8) When one of the observation has value 0 then we cannot use Show Answer

Q9) When the observation are 7, 5, 7, -1, 8, 4 then to find average we cannot use Show Answer

Q10) We can have more than one observation as average in case Show Answer

Q11) Percentiles & Deciles divides the gives set of observations into Show Answer

Q12) Among AM, HM & GM the largest value is of Show Answer

Q13) The best measure or finding average rate of increase or decrease is Show Answer

Q14) When there are three points of division at equal intervals then Show Answer

Q15) In case Quartiles the number of points of division are Show Answer

Q16) If an organization wants to give more importance to marks obtained in Personal interview than the marks obtained in GD & written test then the best method is Show Answer

Q17) Mean is affected by Show Answer

Q18) For locating mode graphically we have to use Show Answer

Q19) Out of Mean, Median & Mode if we know any 2 of them then we can find the third using:- Show Answer

Q20) Following measure cannot be used for further Algebric treatment: Show Answer

Q21) We can find combined average of Show Answer

Q22) The G.M of 8, 2 & 4 is Show Answer

Q23) The H.M of 6, 14, 21 & 30 Show Answer

Q24) If " X " travels 16 km. at 4 km. an hour, 6 km. at 3 km. per hour and 4 km. at 2 km. per hour, what would be the average rate Show Answer

Q25) In a moderately asymmetrical distribution the mode & mean are 32.1 & 35.4 respectively. Therefore the value of median Show Answer

Q26) There are 60 women, 40 men and 50 children in a factory. The average number of units produced by women is 70, that by men is 80 and the average by children is 50. What is the average number of units produced per worker in the factory? Show Answer

Q27) AM = 10 & GM = 8. Therefore the value of HM is Show Answer

Q28) AM = 10 & GM = 8. Therefore the 2 observations are Show Answer

Q29) If there are two groups with 10 & 20 observations and having Harmonic means 32 & 18 respectively then combined HM is Show Answer

Q30) Out of Mean, Median & Mode the average which is between the other two is Show Answer

Q31) The mean age of 21 students of a class is 16.5 yrs. One more students of age 14.3 yrs are added to this group. The mean age of the new group is Show Answer

Q32) The mean age of combined group of men & women is 25 yrs, if the mean age of the group of men is 26 & that of women is 21, then the percentage of women & men in the group is Show Answer

Q33) A.M = G.M = 25 for 15 observation. Therefore the H.M is Show Answer

Q34) The mean, median and mode of weights of a group of 79 students are found to be 55, 56, 57 kgs respectively. 6 more students are added to the groups whose weights are 52, 52, 52.5, 59.5, 60, 60 kgs. What will be values of mean, median and mode of the combi Show Answer

Q35) An automobile driver travels from plain to a hill station, 100 km. distance at an average speed of 30 km per hour. He then makes the return trip at average speed of 20 km per hour. What is his average speed over the entire distance (200 km)? Show Answer

Q36) G.M is G.M of A.M & H.M Show Answer

Q37) The arithmetic mean of the number letters of the words in the following paragraph: Social organization among tigers varies with the quality of habitate in a given area, the determinant of quality being Also find the arithmetic means. Show Answer

Q38) Semi Inter Quartile Deviation means Show Answer

Q39) The best measure of dispersion is Show Answer

Q40) The best measure of dispersion in case of open ended class intervals is Show Answer

Q41) Measure of Dispersion based on only extreme value is Show Answer

Q42) Number of relation measures of dispersion is Show Answer

Q43) Number of absolute measures of dispersion is Show Answer

Q44) Co-efficient of variation is Show Answer

Q45) Co-efficient of range when highest observation = 20 lowest observation = 10 is Show Answer

Q46) The purpose of dispersion is to find Show Answer

Q47) In case of quality control procedures the absolute measure of dispersion most commonly used is Show Answer

Q48) The Standard Deviation of 5, 5, 5, 5, 5, 5, 5, 5 is Show Answer

Q49) Standard Deviation = - 4. The statement is Show Answer

Q50) Measure of Dispersion is affected by Show Answer

Q51) We can find combined measure of Dispersion after combining 2 or more groups using Show Answer

Q52) Mean Deviation from _________ is the least. Show Answer

Q53) If all the observations are decreased by 5 then the new Standard Deviation is Show Answer

Q54) Measure of Dispersion easiest to calculate Show Answer

Q55) To find which group shows more variation we use. Show Answer

Q56) Absolute value of the deviations are considered for calculation : Show Answer

Q57) The measure of Dispersion based on all the observations Show Answer

Q58) __________ is defined as the root mean square deviation Show Answer

Q59) What is the coefficient of range for the following : 32, 35, 30, 38, 42, 29, 33, 37 Show Answer

Q60) Range is based on Show Answer

Q61) The value of range will always be Show Answer

Q62) The sum of the upper and the lower quartile is found to be 160 and their difference is 80. The value of the coefficient of quartile deviation is Show Answer

Q63) The coefficient of quartile deviation for a certain data is 0.2. The sum of the two quartile is hundred. The value of two quartiles are Show Answer

Q64) The value of the quartile deviation for certain data is 8.7. The value of the upper quartile is given to be 67. the value of lower quartile is Show Answer

Q65) The coefficient of quartile deviation for the following values: 55, 56, 45, 46, 61, 58, 57, 55, 47, 51, 55, 51 Show Answer

Q66) Mean deviation from mean for the following set of values 10, 14, 7, 9, 4, 16 is Show Answer

Q67) The mean deviation about median for the following values : 48, 50, 39, 46, 57 is Show Answer

Q68) The co-efficient of M.D. from median for the following set 150, 151, 152, 156, 154, 160, 158 is Show Answer

Q69) The median and S.D. of a distribution are 15 and 3 respectively. If each items is increased by 2, the new median and the new S.D. are Show Answer

Q70) If sum of 10 items is 12 & the sum of their squares is 16.9 then S.D. is Show Answer

Q71) The standard deviation of the following marks: -85, 87, 60, 67, 80, 83, 15 Show Answer

Q72) The age of 5 persons on their last birthday in the year 2005 was 19, 9, 12, 15 and 50. Therefore the mean and the variance of their ages are Show Answer

Q73) The average weight of 150 students in a class was 58 kgs. There were 100 boys in a class whose average weight was 60 kgs. The variance of weights for the whole class was 15 and that for the group of boys was 9. Find the average weight and variance of weig Show Answer

Q74) The first of the two groups has 100 items with mean 45 and variance 49. If the combined group has 250 items with mean 51 and variance 130, find the mean and the standard deviation of the second group. Show Answer

Q75) The mean and standard deviation of the marks of a group of 100 students in a test in Mercantile Law were given to be 40 and 3 respectively. It was afterwards detected that the marks of one student were wrongly written as 37 instead of 73. Calculate the co Show Answer

Q76) Co-efficient of variance for two groups. Group A and B are 60 % and 64 % respectively. Their standard deviations are 15 and 16 respectively. Group A contains 30 items while B contains 20 items. Find the standard deviation of all 50 items taken together. Show Answer

Q77) The study of finding relation between two set of observation is called Show Answer

Q78) If X and Y are two related variables then the relation y = a + bx is satisfied by Show Answer

Q79) The AM of 1, 2, 3, ... is Show Answer

Q80) If all the observations are equal K then mean is Show Answer

Q81) If x and y are two related variables such that y = 3x + y and mean of x is 20 then mean of y is Show Answer

Q82) The limits for finding middle 70% of the observations is Show Answer

Q83) If GM of u is 5 and GM of v is 7 then GM of uv is Show Answer

Q84) The formula for finding Co-efficient of variation is Show Answer

Q85) If all the observations are measured by 10 % then the new Quartile Deviation is Show Answer

Q86) Variation is defined as Show Answer

Q87) If x and y are 2 related variables such that 3x + 2y - 14 = 0 and Quartile Deviation of x is 8.24 then quartile deviation of y is Show Answer

Q88) M.D. (Me) and Median for x is .3 and 1 respectively. The co-efficient of M.D. (Me) of y is _________, when 2x + 3y - 7 = 0 where x and y is 2 related variables. Show Answer

Q89) S.D. of x = 3. Therefore S.D. of 3-2x is Show Answer

Q90) S.D. of x = 5. Variance of 7x - 3 is Show Answer

Q91) Variance of x = 36. Therefore variance of y when 3x + 4y = 20 is Show Answer