Answer:
Teachers in his school district have less than 5 yearſ of experience on average is true.
Step-by-step explanation:
Sample mean = ![\bar{x}=4](https://tex.z-dn.net/?f=%5Cbar%7Bx%7D%3D4)
Sample standard deviation = s = 2
We are supposed to to test Ha :u= 5 versus H : u < 5 using a sample of 25 teachers
![H_a:\mu=5\\H_0:\mu < 5](https://tex.z-dn.net/?f=H_a%3A%5Cmu%3D5%5C%5CH_0%3A%5Cmu%20%3C%205)
n = 25
Since n<30 and population standard deviation is unknown
So, we will use t test
Formula : ![t=\frac{x-\mu}{\frac{s}{\sqrt{n}}}](https://tex.z-dn.net/?f=t%3D%5Cfrac%7Bx-%5Cmu%7D%7B%5Cfrac%7Bs%7D%7B%5Csqrt%7Bn%7D%7D%7D)
![t=\frac{4-5}{\frac{2}{\sqrt{25}}}](https://tex.z-dn.net/?f=t%3D%5Cfrac%7B4-5%7D%7B%5Cfrac%7B2%7D%7B%5Csqrt%7B25%7D%7D%7D)
t=-2.5
![\alpha = 0.05](https://tex.z-dn.net/?f=%5Calpha%20%3D%200.05)
Degree of freedom = n-1 = 25-1 = 24
Refer the t table
![t_{df,\frac{\alpha}{2}}=t_{24,\frac{0.05}{2}}=2.064](https://tex.z-dn.net/?f=t_%7Bdf%2C%5Cfrac%7B%5Calpha%7D%7B2%7D%7D%3Dt_%7B24%2C%5Cfrac%7B0.05%7D%7B2%7D%7D%3D2.064)
t critical > t calculated
So, We are failed to reject null hypothesis
So, teachers in his school district have less than 5 yearſ of experience on average is true.
Answer:
Step-by-step explanation:
Sorry but i dont know.
Answer:
I don't think their are any repeating decimals.
Step-by-step explanation:
Lemme see so, 16/25=0.64
Hope my answer has helped you!
Answer:
no
Step-by-step explanation:
foot lettuce