Answer: [tex]H_0: \mu=90^{\circ}F[/tex]
Step-by-step explanation:
Definition:
Null hypothesis [tex]H_0[/tex]: It is a statement describing population parameter as per the objective of the study . It generally takes [tex]=, \leq, \geq[/tex] signs.
Alternative hypothesis [tex]H_1[/tex]: It is also a statement describing population parameter as per the objective of the study . It generally takes >, <, ≠ signs.
Let [tex]\mu[/tex] be the average temperature in July in Atlanta.
As per given ,
From 1900 to 2000 the average temperature in July in Atlanta was 90°F.
i.e. [tex]\mu=90^{\circ}F[/tex]
A researcher believes due to Global Warming that the average temperature is increasing in Atlanta.
[tex]\mu>90^{\circ}F[/tex]
Clearly by using definition ,
Null hypothesis : [tex]H_0: \mu=90^{\circ}F[/tex]
