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bus-stat-book1

# No height weight sno height weight 1 70 170 11 70 163

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Unformatted text preview: down the marginal distribution of X and Y. 63 S.No. Height Weight S.No. Height Weight 1 70 170 11 70 163 2 65 135 12 67 139 3 65 136 13 63 122 4 64 137 14 68 134 5 69 148 15 67 140 6 63 121 16 69 132 7 65 117 17 65 120 8 70 128 18 68 148 9 71 143 19 67 129 10 62 129 20 67 152 Solution: Bivariate frequency table showing height and weight of persons. 6 6 6 6 7 T Height(x) 62-64 64-66 66-68 68-70 70-72 Total Weight(y) 4 115-125 II (2) II (2) 5 125-135 I (1) I (1) II (2) I (1) 135-145 III (3) II (2) I (1) 6 145-155 I (1) II (2) 3 155-165 I (1) 1 165-175 I (1) 1 Total 3 5 4 4 4 20 The marginal distribution of height and weight are given in the following table. Marginal distribution of Marginal distribution height (X) of (Y) CI Frequency CI Frequency 62-64 3 115-125 4 64-66 5 125-135 5 66-68 4 135-145 6 68-70 4 145-155 3 70-72 4 155-165 1 Total 20 165-175 1 Total 20 64 Exercise - 4 I. Choose the best answer: 1. In an exclusive class interval (a) the upper class limit is exclusive. (b) the lower class limit is exclusive. (c) the lower and upper class limits are exclusive. (d) none of the above. 2. If the lower and upper limits of a class are 10 and 40 respectively, the mid points of the class is (a) 15.0 (b) 12.5 (c) 25.0 (d) 30.0 3. Class intervals of the type 30-39,40-49,50-59 represents (a) inclusive type (b) exclusive type (c) open-end type (d) none. 4. The class interval of the continuous grouped data is 10-19 20-29 30-39 40-49 50-59 (a) 9 (b)10 (c) 14.5 (d) 4.5 5. Raw data means (a) primary data (b) secondary data (c) data collected for investigation (d)Well classified data. II. Fill in the blanks: 6. H.A.Sturges formula for finding number of classes is ________. 7. If the mid-value of a class interval is 20 and the difference between two consecutive midvalues is 10 the class limits are ________ and ________. 8. The difference between the upper and lower limit of class is called ______. 9. The average of the upper and lower limits of a class is known as _________. 10. Number of observations falling within a particular cl...
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