P values  P means probability. Therefore, it represents the probability of an event occurring. It evaluates how good the data supports the null hypothesis.

CI  The CI is a value that we are fairly certain our sample mean lies within. Normally measured at 95%. If samples were taken on numerous occasions, we would expect that 95% would contain the sample mean. Five per cent of the intervals would not contain the mean.

Correlation coefficients  The correlation coefficient measures the strength and direction of the relationship between two variables. The range of values for the correlation coefficient (called r) is between −1.0 and 1.0.

Mean  The mean, often called the average, is a measure of central tendency. It is the sum of all the values in a data set divided by the number of samples. For example, if this is a data set: 1, 1, 2, 2, 2, 2, 3, 3, 4, 4, 5, 5, 5 the mean is ‘3’ (39/13). It is useful in describing the sample characteristics such as age. 
Mode  The mode is a measure of central tendency (average). It is the value that appears the most. For example, if this is a data set: 1, 1, 2, 2, 2, 2, 3, 3, 4, 4, 5, 5, 5 the mode is ‘2’. There can be more than one mode which is known as bimodal.

Median  The median is a measure of central tendency (average). It is the middle value in a data set arranged in numerical order. For example, if this is a data set: 1, 1, 2, 2, 2, 2, 3, 3, 4, 4, 5, 5, 5 the median (middle) number is 3. You have as many numbers on one side than the other of the median number.

SD  The SD is a measure of how your data are spread around the mean.
