State whether the following statements are TRUE or FALSE.
(a) The heights of the bars in a histogram represent the mean of the interval.
(b) The preferred measure of centre for categorical data is the mode.
(c) A correlation coeﬃcient of +1 means that both variables increase together.
(d) The inter-quartile range gives the spread of the middle quarter of the data.
(e) For symmetrical data, the mean and the median are approximately the same.

Question

State whether the following statements are TRUE or FALSE.
 (a) The heights of the bars in a histogram represent the mean of the interval. 
(b) The preferred measure of centre for categorical data is the mode. 
(c) A correlation coeﬃcient of +1 means that both variables increase together. 
(d) The inter-quartile range gives the spread of the middle quarter of the data. 
(e) For symmetrical data, the mean and the median are approximately the same.