1. The following frequency distribution represents 50 exam scores. Complete the frequency table below. (2 marks)

Exam Scores	Tally	Frequency	Relative Frequency
(25-40]	I
(40-55]	IIIIIII
(55-70]	III
(70-85]	IIIIIIIIIIIIIIII
(85-100]	IIIIIIIIIII
(100-115]	IIIII
(115-130]	IIIIIII

Construct a histogram or a bar graph based on the table above. State what distribution you see and comment on the amount of intervals. (6 marks)

2.: The final Data Management marks for two classes are listed below:

Class A	71	82	55	76	66	71	90	84	95	64	71	70	73	45	73	51	68	99
Class B	54	80	12	61	73	69	92	81	80	61	75	74	15	44	91	63	50	84

1. Determine the three measures of central tendency for each class. (6 Marks)
2. Use the measures to compare the performance of the two classes. (2 marks)
3. Comment on the affect of outliers. (1 Mark)
4. Determine and compare the range of the two classes. Comment/compare the classes IQR's (4 marks)
5. Select 1 class and determine the standard deviation of the class. (4 marks)

3. In a certain course, a student's overall mark is computed using the following weights: Term 70%, culminating task 15%, and overall exam 15%. Currently, Alex has a mark of 78% in the term and he achieved 85% on the culminating task. What mark must Alex achieve on the overall exam to finish with a mark of 82% in the course? Round your overall answer to one decimal place. (3 marks)