Step-by-step explanation:
1) let number=a
six times a number=6a
Condition:
6a+4=22
2) eleven times a number=11a
Condition:
11a-5=50
3) 9 times a number=9a
Condition:
9a-7=-16
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Step-by-step explanation:
1) see the attached picture;
2) 120+80=200 (persons).
PS. change the design according to local requirements.
Answer:
The responses can be defined as follows:
Step-by-step explanation:
Given:

Testing the hypothesis:


critical value
(using the standard normal table)
so, we reject
.