127, 131, 139, ? , 151, 155, 163, 167 | CLASS 14 | श्रृंखला | REASONING | Doubtnut

Observe the given data of the height of 15 studetns (in cm 146, 139, 135, 136, 149, 166, 164, 152, 163, 141, 171, 155, 144, 159, 146 Match the lists : {:(" List - I ", " List - II" ),(" (i) Range of the data is "," (p) 151 . 0 6 cm "),(" (ii) Mean height of the students is "," (q) 146 cm "),(" (iii) Median of the data is "," (r) 36 cm "),(" (iv) Mode of the data is "," (s) 149 cm "):}

The weights in grams of 50 apples picked at random from a consignment are as follows 106, 107, 76, 82, 109, 107, 115, 93, 187, 195, 123, 125, 111, 92, 86, 70, 126, 68, 130 129, 139 119, 115, 128, 100, 186, 84, 99, 118, 204, 111, 141, 136 123, 90, 11 98, 110, 78, 90, 107, 81, 131, 75, 84, 104, 110, 80, 118, 82. Form the grouped frequency table by dividing the variable range into intervals of equal width, each corresponding to 70 gms in such a way that mid-value of the first class corresponds to 70 gms.

The heights of 50 students, measured to the nearest centimetres, have been found to be as follows: 161 150 154 165 168 161 154 162 150 151 162 164 171 165 158 154 156 172 160 170 153 159 161 170 162 165 166 168 165 164 154 152 153 156 158 162 160 161 173 166 161 159 162 167 168 159 158 153 154 159 (i) Represent the data given above by a grouped frequency distribution table, taking the class intervals as 160 - 165, 165 - 170, etc. (ii) What can you conclude about their heights from the table?

The heights of 50 students, measured to the nearest centimetres, have been found to be as follows: 161 150 154 165 168 161 154 162 150 151 162 164 171 165 158 154 156 172 160 170 153 159 161 170 162 165 166 168 165 164 154 152 153 156 158 162 160 161 173 166 161 159 162 167 168 159 158 153 154 159 Represent the data given above by a grouped frequency distribution table, taking the class intervals as 160-165, 165-170, etc.

In the following questions, a series is given, with one term missing. Choose the correct alternative from the given ones that will complete the series. 127, 131 , 139 , ____, 151, 157,163, 167

The heights (in cm) of 30 students of class VIII are given below: 155,158,154,158,160,148,149,150,153,159,161,148,157, 153,157,162,159,151,154,156,152,156,160,152,147,155,163,155, 157,153 Prepare a frequency distribution table with 160-164 as one of the class intervals.

The class marks of a continuous distribution are 1.04, 1.14, 1.24, 1.34, 1.44, 1.54 and 1.54 Is it correct to say the last interval will be 1.55-1.73 ? Justify your answer.

Calsulate Q_(1)and Q_(3) of the heights (in cm) of 12 person, 150,153,154,148,160,162,163,168,166,167,151,156 a Also calculate median.

The weights in grams of 50 oranges picked at random from a consignment are as follows: 131,113,82,75,204,81,84,118,104,110,80,107,111,141, 136,123,90,78,90,115,110,98,106,99,107,84,76,186,82, 100,109,128,115,107,115,119,93,187,139,129,130,68, 195,123,125,111,92,86,70,126 Form the grouped frequency table by dividing the variable range into intervals of equal width, each corresponding to 20gms in such a way that the mid-value of the first class corresponds to 70 gms.

The following is the distribution of height of students of a certain class in a certain city: {: ("Height (in cms)", 160-162 163-165 166-168 169-171 172-174), ("No. of students", 15 118 142 127 18):} Find the median height.