Answer:
[tex]H_{\0}:\mu =120[/tex] [tex]H_{\0}:\mu \neq 120[/tex]
Step-by-step explanation:
it is given in question that
sample space n=34
μ the population mean =120
the sample mean [tex]\bar{x}=115[/tex]
the population standard deviation σ=20
we have to find the null hypothesis and alternative hypothesis
null hypothesis
the average braking distance for a small car travelling at 65 miles per hour equals to 120 feet
so [tex]H_{\0}:\mu =120[/tex]
Alternative hypothesis
the average braking distance for a small car travelling at 65 miles per hour not equals to 120 feet
so [tex]H_{\0}:\mu \neq 120[/tex]
