Answer:
The left knee injuries are more than half.
Step-by-step explanation:
Given that the anterior cruciate ligament (ACL) runs diagonally in the middle of the knee.
Sample size n = 85
left knee = 53
p = Sample proportion = [tex]\frac{53}{85} \\=0.624[/tex]
[tex]H_0: p = 0.5\\H_a: p>0.5[/tex]
(Right tailed test)
p difference = 0.124
std error = [tex]\sqrt{\frac{0.5(0.5)}{85} } \\=0.0542[/tex]
Test statistic z = 2.28
p value = 0.01130
Since p <0.05, at 5% level we reject H0.
The left knee injuries are more than half.
