An ad is placed in newspapers in four counties asking for volunteers to test a new medication for reducing blood pressure. The number of inquiries received in each area is as shown here.
What is the expected number for area A?
What is the chi square test value (to the nearest tenth?)
County
|
A
|
B
|
C
|
D
|
Total
|
Inquiries
|
87
|
62
|
56
|
95
|
300
|