relative frequency distribution

The weight (in grams) of a sample of 50 eggs are as shown in the frequency distribution table. Weight Frequency 80 - 84 2 85 - 89 6 90 - 94 12 95 - 99 14 100 - 104 10 105 - 109 5 110 - 114 1 Find the variance and standard deviation. => 6.85 and 2.62 or 96.3 and 9319.7 ..

The frequency distribution represents the data obtained from a sample of computer repairs. The values are the mean time (in hours) between repairs on 80 machines. Mean time between repairs Number of machines 25.5 - 28.5 5 28.5 - 31.5 9 31.5 - 34.5 32 34.5 - 37.5 20 37.5 - 40.5 1..

The daily water consumption (in m 3 ) of 25 different textile mills recorded by the Water Authority is shown. 2400 2700 1100 1830 2200 2250 1400 1720 2620 1580 1640 2100 1360 1750 2600 1440 1900 2520 1700 1210 2300 2050 1500 1990 2320 Identify the frequency of each class by constructing a..

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..

A paediatric hospital presents data on the number of children and their stay in the hospital for their postnatal care during March 2005 as a frequency distribution: Days Number of children 0 - 4 25 5 - 9 11 10 - 14 10 15 - up 4 What is the probability that a child selected at ra..

A field survey shows the lifetime (in years) of a particular model of a washing machine in the frequency distribution table. Lifetime of washing machines Number of washing machines 0 - 2 5 2 - 4 16 4 - 6 13 6 - 8 7 8 - 10 5 10 - 12 4 Find the variance and standard deviation. => ..

The distribution of the ages of the members of a colony is as follows : Age Frequency 0 - 20 35 21 - 30 15 31 - 40 20 41 - 50 25 51 - 60 15 61 - up 10 If a person is selected at random, then find the probability that his/her age is less than 30 years. => 5 12 or 1 8 or 7 12 or 7..

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 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 scored ..

Recognize the incorrect statement(s). I. When all data for a variable are transformed into z scores, the resulting distribution will have a mean of 1 and a standard deviation of 0. II. The z score represents the number of standard deviations that a data value falls above or below the mean..

The mean of the frequency distribution shown is 18.5. Find the value of t . x 18 23 t 15 16 f 2 9 4 8 7 => 20 or 30.6 or 20.6 or 30..