grouped data

There are three methods to find mean for a frequency distribution. (i) Direct method: where x is the mid-interval f is the frequency M is the mean (ii) Short-cut method: where A = assumed mean d = x - A (iii) Step-deviation method: where i = class size We illustrate each of these methods w..

Mrs.Smith has divided all the students in her class into groups. The line plot shows the number of girls in each group. Find the mode of the data shown. => 11 or 5 or 9 or 4..

The tally chart represents the numbers of balloons bought by a group of girls. Which graph represents the data correctly? => Graph 3 or Graph 4 or Graph 2 or Graph 1..

The following data is about the grades of students in a test. Which of the following show the intervals of equal size to group the data? 58 73 80 79 51 66 67 59 60 73 76 76 78 78 60 57 78 62 65 => 51-65, 75-80 or 50-55, 55-60, 60-65, 65-70, 70-75, 75-80 or 51-55, 60-65..

The ages of group trekking the Swiss Alps mountain are displayed in the stem-and-leaf plot. How many data values above 36 are there in the plot? => 3 or 5 or 2 or 4..

A surveyor asked a group of people to name the city they like most. Using the data in the given line plot, find the probability of choosing a person who likes the City C most. => 11 12 or 1 12 or 5 12 or 7 12..

On treatment with mercaptide ion (RS - ) haloalkanes give thioethers. Thioethers are also formed by heating the haloalkanes with sodium or potassium sulphide. ..

In a two-way ANOVA, variable A has three levels and variable B has two levels. The number of data values in each group is five. Find the degrees of freedom for factor A × B and for the within (error) factor. => 2, 24 or 4, 3 or 2, 1 or 3, 2..

In an experiment, three drugs were tested to see how much pain relief each provides. Pain relief was rated on a ten-point scale. Five subjects were tested in each group and their data are as shown in the table. At α = 0.05, find the F test value. Can it be concluded that t..

The ages of group trekking the Swiss Alps mountain are 25, 54, 25, 33, 83, 33, 55, 65, 34, 35 and 25. How many leaves are there in the data? => 11 or 3 or 10 or 4..