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John Mark studied the ages of patients who had strokes caused by stress. The ages of 35 patients who suffered stress strokes were as follows:

46	49	53	51	44
45	41	45	42	50
44	41	43	48	32
53	43	47	49	45
49	47	50	57	59
44	43	42	52	34
39	40	33	43	49

Use a grouping with the first class’ lower limit 30 and the class width of 5 to:

Create the frequency table:

Ages	Freq
$\displaystyle {30}\le{x}<{40}$	4
$\displaystyle {40}\le{x}<{50}$	23
$\displaystyle {50}\le{x}<{60}$	8

Ages	Freq
$\displaystyle {25}\le{x}<{30}$	0
$\displaystyle {30}\le{x}<{35}$	3
$\displaystyle {35}\le{x}<{40}$	1
$\displaystyle {40}\le{x}<{45}$	12
$\displaystyle {45}\le{x}<{50}$	11
$\displaystyle {50}\le{x}<{55}$	6
$\displaystyle {55}\le{x}<{60}$	2

Ages	Freq
$\displaystyle {30}\le{x}<{35}$	6
$\displaystyle {35}\le{x}<{40}$	4
$\displaystyle {40}\le{x}<{45}$	6
$\displaystyle {45}\le{x}<{50}$	6
$\displaystyle {50}\le{x}<{55}$	9
$\displaystyle {55}\le{x}<{60}$	4

Ages	Freq
$\displaystyle {30}\le{x}<{35}$	3
$\displaystyle {35}\le{x}<{40}$	1
$\displaystyle {40}\le{x}<{45}$	12
$\displaystyle {45}\le{x}<{50}$	11
$\displaystyle {50}\le{x}<{55}$	6
$\displaystyle {55}\le{x}<{60}$	2

Ages	Freq
$\displaystyle {25}\le{x}<{35}$	3
$\displaystyle {35}\le{x}<{45}$	13
$\displaystyle {45}\le{x}<{55}$	17
$\displaystyle {55}\le{x}<{65}$	2

Create the frequency histogram:

Identify the shape of the distribution of the data:

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