Answer: 

Step-by-step explanation:
- A null hypothesis is a hypothesis where a researcher generally try to disprove, it says that there is no statistically significant relationship between the two variables .
- An alternative hypothesis says that there is a statistical significance between two variables.
Claim 1. : Mean age of online dating service users is 40 years.
i.e.
, since it has equals sign so we take this as null hypothesis.
Claim 2. : Mean age of online dating service users is not 40 years.
⇒ Null Hypothesis : 
Alternative hypothesis : 
Yes it is greater than 1/2
Answer: 33/3
Step-by-step explanation:
I don't know the question is weird but it probably is 33/3
Answer:
They would be -104 and -103.
Step-by-step explanation:
-103 + (-104)
= -103 - 104
= -207.
the answer is supposed to be 132 at the most of a
for b it is 165