Calculate the mean
Salt consecrations
(mol dm-3) % of Cells Plasmolysed Mean
0.2 8 11 9 9 answer
0.4 29 26 25 28 answer
0.6 99 100 97 98 answer
To calculate the mean of the salt concentrations, we add up all the values and divide by the number of values.
For the first set of data:
0.2 + 0.2 + 0.2 + 0.2 = 0.8
0.8 / 4 = 0.2
So the mean for the first set of data is 0.2 mol dm-3.
For the second set of data:
0.4 + 0.4 + 0.4 + 0.4 + 0.4 = 2
2 / 5 = 0.4
So the mean for the second set of data is 0.4 mol dm-3.
For the third set of data:
0.6 + 0.6 + 0.6 + 0.6 + 0.6 + 0.6 + 0.6 + 0.6 + 0.6 + 0.6 = 6
6 / 10 = 0.6
So the mean for the third set of data is 0.6 mol dm-3.
To calculate the mean of the salt concentrations, you need to add up all the values and divide by the total number of values.
For the first set of data:
Mean = (0.2 + 0.2 + 0.2 + 0.2 + 0.2 + 0.2 + 0.2 + 0.2 + 0.2 + 0.2 + 0.2) / 11
Mean = 2.2 / 11 = 0.2
So the mean of the salt concentrations for the first data set is 0.2 mol dm^-3.
For the second set of data:
Mean = (0.4 + 0.4 + 0.4 + 0.4 + 0.4 + 0.4 + 0.4 + 0.4 + 0.4 + 0.4 + 0.4 + 0.4 + 0.4 + 0.4 + 0.4 + 0.4 + 0.4 + 0.4 + 0.4 + 0.4 + 0.4 + 0.4 + 0.4 + 0.4 + 0.4 + 0.4 + 0.4 + 0.4 + 0.4 + 0.4 + 0.4 + 0.4 + 0.4) / 28
Mean = 11.2 / 28 = 0.4
So the mean of the salt concentrations for the second data set is 0.4 mol dm^-3.
For the third set of data:
Mean = (0.6 + 0.6 + 0.6 + 0.6 + 0.6 + 0.6 + 0.6 + 0.6 + 0.6 + 0.6 + 0.6 + 0.6 + 0.6 + 0.6 + 0.6 + 0.6 + 0.6 + 0.6 + 0.6 + 0.6 + 0.6 + 0.6 + 0.6 + 0.6 + 0.6 + 0.6 + 0.6 + 0.6 + 0.6 + 0.6 + 0.6 + 0.6 + 0.6 + 0.6 + 0.6 + 0.6 + 0.6 + 0.6 + 0.6 + 0.6 + 0.6 + 0.6 + 0.6 + 0.6 + 0.6 + 0.6 + 0.6 + 0.6 + 0.6 + 0.6 + 0.6 + 0.6 + 0.6 + 0.6 + 0.6 + 0.6 + 0.6) / 98
Mean = 58.8 / 98 = 0.6
So the mean of the salt concentrations for the third data set is 0.6 mol dm^-3.
Therefore, the calculated means for the given data sets are:
- First data set: 0.2 mol dm^-3
- Second data set: 0.4 mol dm^-3
- Third data set: 0.6 mol dm^-3
To calculate the mean, you need to add up all the values and divide the sum by the total number of values. In this case, we have three sets of data for salt concentrations and their corresponding percentages of cells plasmolysed. Let's calculate the mean for each set:
For the first set:
8 + 11 + 9 + 9 = 37
The total sum is 37. Since there are four values, we divide the sum by 4 to get the mean.
Mean = 37 / 4 = 9.25
For the second set:
29 + 26 + 25 + 28 = 108
The total sum is 108. Since there are four values, we divide the sum by 4 to get the mean.
Mean = 108 / 4 = 27
For the third set:
99 + 100 + 97 + 98 = 394
The total sum is 394. Since there are four values, we divide the sum by 4 to get the mean.
Mean = 394 / 4 = 98.5
So, the means for the three sets are:
- For the first set: 9.25
- For the second set: 27
- For the third set: 98.5