Answer:
Z= -2.83
Step-by-step explanation:
The formula for calculating z-score is :
[tex]Z= \frac{\bar{x}-\mu}{\frac{\sigma}{\sqrt{n}} }[/tex]
[tex]\bar{x}[/tex] = 33000
μ = 34000
n = 200
σ = 5000
Putting all values,
[tex]Z= \frac{33000-34000}{\frac{5000}{\sqrt{200}} }[/tex]
⇒ Z= -2.83
