BUS:210 Business Statistic I

1 . The ages of a sample of 30 people living in assisted living facilities in Columbia , South Carolina are shown in the table .76 74 71 78 80 67

80 82 67 88 72 78

85 76 84 82 83 80

72 82 77 79 86 89

69 70 82 86 78 77 Construct a dot plot for the data

67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 2 . The following stem and leaf plot shows the

scores on a recent test of Pre-Calculus students .STEM LEAF

5 6 8

6 1 2 2 4 8

7 0 4 6 6

8 0 4 4 6 6 6 6 6

9 0 2 6

10 0 a . How many students took the test

Number of Student 2 5 4 8 3 1 23

b . What were the highest and lowest scores

Highest Score 100

Lowest score 56

c . How many students scored 70 or higher Number of student scored 70 or higher 4 8 3 1 16 3 . A scatter diagram is a graphic tool to portray the relationship between two variables a . If the scatter of points moves from the lower left to the upper right , how are the variables under consideration related The variables under consideration are positively related that is there is positive correlation between variable under consideration

b . If the scatter of points moves from the upper left to the lower...