Written/Composed by:- Adnan Maqbool , Contact # 0315-3130411 My Youtube Channel: Informationpk Website: www.informationpk.com , E-mail:
[email protected] Statistics Notes for I.com / F.A / FSc / BSc / B.com / BS / BBA / MBA / M.Com / ACCA Visit: www.informationpk.com for Notes, Past papers, Home Tuition and more. 1 MCQ No 3.1 Any measure indicating the center of a set of data, arranged in an increasing or decreasing order of magnitude, is called a measure of: (a) Skewness (b) Symmetry (c) Central tendency (d) Dispersion MCQ No 3.2 Scores that differ greatly from the measures of central tendency are called: (a) Raw scores (b) The best scores (c) Extreme scores (d) Z-scores MCQ No 3.3 The measure of central tendency listed below is: (a) The raw score (b) The mean (c) The range (d) Standard deviation MCQ No 3.4 The total of all the observations divided by the number of observations is called: (a) Arithmetic mean (b) Geometric mean (c) Median (d) Harmonic mean MCQ No 3.5 While computing the arithmetic mean of a frequency distribution, the each value of a class is considered equal to: (a) Class mark (b) Lower limit (c) Upper limit (d) Lower class boundary MCQ No 3.6 Change of origin and scale is used for calculation of the: (a) Arithmetic mean (b) Geometric mean (c) Weighted mean (d) Lower and upper quartiles MCQ No 3.7 The sample mean X̅ is a: (a) Parameter (b) Statistic (c) Variable (d) Constant MCQ No 3.8 The population mean μ is called: (a) Discrete variable (b) Continuous variable (c) Parameter (d) Sampling unit MCQ No 3.9 The arithmetic mean is highly affected by: (a) Moderate values (b) Extremely small values (c) Odd values (d) Extremely large values www.Informationpk.com
Written/Composed by:- Adnan Maqbool , Contact # 0315-3130411 My Youtube Channel: Informationpk Website: www.informationpk.com , E-mail:
[email protected] Statistics Notes for I.com / F.A / FSc / BSc / B.com / BS / BBA / MBA / M.Com / ACCA Visit: www.informationpk.com for Notes, Past papers, Home Tuition and more. 2 MCQ No 3.10 The sample mean X is calculated by the formula: a) ∑ fX ∑f b ) A+ ∑ fd ∑f c ) A+ ∑ fu ∑f x h d ) A l l of t h e A b o v e MCQ No 3.11 If a constant value is added to every observation of data, then arithmetic mean is obtained by: (a) Subtracting the constant (b) Adding the constant (c) Multiplying the constant (d) Dividing the constant MCQ No 3.12 Which of the following statements is always true? (a) The mean has an effect on extreme scores (b) The median has an effect on extreme scores (c) Extreme scores have an effect on the mean (d) Extreme scores have an effect on the median MCQ No 3.13 The elimination of extreme scores at the bottom of the set has the effect of: (a) Lowering the mean (b) Raising the mean (c) No effect (d) None of the above MCQ No 3.14 The elimination of extreme scores at the top of the set has the effect of: (a) Lowering the mean (b) Raising the mean (c) No effect (d) Difficult to tell MCQ No 3.15 The sum of deviations taken from mean is: (a) Always equal to zero (b) Some times equal to zero (c) Never equal to zero (d) Less than zero MCQ No 3.16 If X = 25, which of the following will be minimum: (a) ∑(X – 27)2 (b) ∑(X – 25)2 (c) ∑(X – 22)2 (d) ∑(X + 25)2 MCQ No 3.17 The sum of the squares of the deviations about mean is: (a) Zero (b) Maximum (c) Minimum (d) All of the above MCQ No 3.18 If ∑ (Xi − 50) 10 i=1 = 100, sample mean X will be (a) 10 (b) 50 (c) 60 (d) 100 MCQ No 3.19 For a certain distribution, if ∑(X -20) = 25, ∑(X- 25) =0, and ∑(X-35) = -25, then is equal to: (a) 20 (b) 25 (c) -25 (d) 35 www.Informationpk.com
Written/Composed by:- Adnan Maqbool , Contact # 0315-3130411 My Youtube Channel: Informationpk Website: www.informationpk.com , E-mail:
[email protected] Statistics Notes for I.com / F.A / FSc / BSc / B.com / BS / BBA / MBA / M.Com / ACCA Visit: www.informationpk.com for Notes, Past papers, Home Tuition and more. 3 MCQ No 3.20 The sum of the squares of the deviations of the values of a variable is least when the deviations are measured from: (a) Harmonic mean (b) Geometric mean (c) Median (d) Arithmetic mean MCQ No 3.21 If X1, X2, X3, ... Xn, be n observations having arithmetic mean X and if Y = 4X ± 2, then is qual to: (a) 4X (b) 4X (c) 4X ± 2 (d) 4 ± 2 MCQ No 3.22 If X = 100 and Y = 2X – 200, then mean of Y values will be: (a) 0 (b) 2 (c) 100 (d) 200 MCQ No 3.23 Step deviation method or coding method is used for computation of the: (a) Arithmetic mean (b) Geometric mean (c) Weighted mean (d) Harmonic mean MCQ No 3.24 If the arithmetic mean of 20 values is 10, then sum of these 20 values is: (a) 10 (b) 20 (c) 200 (d) 20 + 10 MCQ No 3.25 Ten families have an average of 2 boys. How many boys do they have together? (a) 2 (b) 10 (c) 12 (d) 20 MCQ No 3.26 If the arithmetic mean of the two numbers X1 and X2 is 5 if X1=3, then X2 is: (a) 3 (b) 5 (c) 7 (d) 10 MCQ No 3.27 Given X1 = 20 and X2 = - 20. The arithmetic mean will be: (a) Zero (b) Infinity (c) Impossible (d) Difficult to tell MCQ No 3.28 The mean of 10 observations is 10. All the observations are increased by 10%. The mean of increased observations will be: (a) 10 (b) 1.1 (c) 10.1 (d) 11 MCQ No 3.29 The frequency distribution of the hourly wage rate of 60 employees of a paper mill is as follows: Wage Rate (Rs.) 54 - 56 56 – 58 58 – 60 60 – 62 62 - 64 Number of workers 10 10 20 10 10 The mean wage rate is: www.Informationpk.com
Written/Composed by:- Adnan Maqbool , Contact # 0315-3130411 My Youtube Channel: Informationpk Website: www.informationpk.com , E-mail:
[email protected] Statistics Notes for I.com / F.A / FSc / BSc / B.com / BS / BBA / MBA / M.Com / ACCA Visit: www.informationpk.com for Notes, Past papers, Home Tuition and more. 4 (a) Rs. 58.60 (b) Rs. 59.00 (c) Rs. 57.60 (d) Rs. 57.10 MCQ No 3.30 The sample mean X of first n natural numbers is: (a) n(n+ 1) / 2 (b) (n - 1) / 2 (c) n/2 (d) (n+ 1) / 2 MCQ No 3.31 The mean of first 2n natural numbers is: a) n(n+1) 2 b) n(2n+1) 2 c) 2n+1 2 d) n+1 2 MCQ No 3.32 The sum of deviations is zero when deviations are taken from: (a) Mean (b) Median (c) Mode (d) Geometric mean MCQ No 3.33 When the values in a series are not of equal importance, we calculate the: (a) Arithmetic mean (b) Geometric mean (c) Weighted mean (d) Mode MCQ No 3.34 When all the values in a series occur the equal number of times, then it is not possible to calculate the: (a) Arithmetic mean (b) Geometric mean (c) Harmonic mean (d) Weighted mean MCQ No 3.35 The mean for a set of data obtained by assigning each data value a weight that reflects its relative importance within the set, is called: (a) Geometric mean (b) Harmonic mean (c) Weighted mean (d) Combined mean MCQ No 3.36 If X1, X2, X3, ... , k be the arithmetic means of k distributions with respective frequencies n1, n2, n3, ... , nk, then the mean of the whole distribution c is given by: (a) ∑X / ∑n (b) ∑n / ∑X (c) ∑n X / ∑n (d) ∑(n+ X ) / ∑n MCQ No 3.37 The combined arithmetic mean is calculated by the formula: a) X1+ X2 n1+n2 b) n1+n2 2 c) n1 X1+n2 X2 n1+n2 d) n1x1+x2n2 2 MCQ No 3.38 The arithmetic mean of 10 items is 4 and the arithmetic mean of 5 items is 10. The combined arithmetic mean is: (a) 4 (b) 5 (c) 6 (d) 90 www.Informationpk.com
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