frequency distribution classes

Cumulative frequency is obtained by adding the frequency of a class interval and the frequencies of the preceding intervals upto that class interva..

80 randomly selected batteries were tested to determine their lifetime (in hours). The following frequency distribution was obtained. Lifetime of batteries Frequency 63.5 - 74.5 10 74.5 - 85.5 15 85.5 - 96.5 22 96.5 - 107.5 17 107.5 - 118.5 11 118.5 - 129.5 5 Find the ..

Recognize the incorrect statement(s). I. A distribution having only one mode is called unimodal. II. The class with largest frequency is called model class. III. The price of bread packet for 7 consecutive years is $2.00, $2.20, $2.70, $3.00, $3.10, $3.60, $3..

The weekly wages of 65 employees at ABC company are recorded and a frequency distribution table is prepared. Wages ($) Number of employees 250 - 259.99 8 260 - 269.99 10 270 - 279.99 16 280 - 289.99 14 290 - 299.99 10 300 - 309.99 5 310 - 319.99 2 Find (i). The percentage of emp..

On the annual day function of a school, 200 chocolates were brought to be distributed among the students of 6 th , 7 th , 8 th and 9 th grades. The frequency table shows the number of chocolates that were distributed among the students of different grades. How many cho..

Mr. Craig made a frequency distribution for the scores secured by his students in a test. Score Number of students Below 75 9 76 - 80 19 81 - 85 3 86 - 90 5 91 - 95 3 96 - 100 1 How many students got more than 85 points? => 12 or 19 or 9 or 5..

In a frequency distribution, the mid-value of each class is obtained. Then on the graph paper, the frequency is plotted against the corresponding mid-value. These points are joined by straight lines. These straight lines may be extended in both directions to ..

Harrison goes for daily morning walk. The number of rounds walked by him around a park per day for a period of one month is recorded. Construct a frequency distribution table for this data. 2 4 3 5 2 1 3 2 3 4 6 2 1 3 4 3 3 2 2 4 5 6 3 4 3 2 5 4 3 3 => both Table 1 and Table 2 o..

The frequency distribution shown here illustrates the number of goals scored by country X in the last 30 matches. Number of goals scored Number of matches played 0 12 1 8 2 2 3 3 4 or more 5 If a match is selected at random, then what is the probability that the number of goals ..

The velocity (m/sec) of water flow in a pipe of 25 m diameter for consecutive days of a month are observed as: 1.5 1.5 1.6 1.4 1.5 1.4 1.6 1.4 1.5 1.3 1.4 1.3 1.4 1.5 1.7 1.6 1.5 1.5 1.5 1.4 1.3 1.5 1.5 1.6 1.7 1.5 1.4 1.4 1.4 1.5 Find the class boundaries for the last class by ..