The first one is the correct one
Answer:
-5,1 i belive
Step-by-step explanation:
Answer:
Three.
Step-by-step explanation:
Split each instrument group (one of each instrument per group). In the end, you will have one trumpet and two pianists left over.
Answer:
1.16 to 2.75
Step-by-step explanation:
The mean salary (millions of dollars) for shortstops was 1.95.
![\bar{x}=1.85](https://tex.z-dn.net/?f=%5Cbar%7Bx%7D%3D1.85)
The population mean for all baseball players was 1.85
![\mu = 1.85](https://tex.z-dn.net/?f=%5Cmu%20%3D%201.85)
The population standard deviation was 1.61.
![\sigma = 1.61](https://tex.z-dn.net/?f=%5Csigma%20%3D%201.61)
Formula of confidence interval :
to ![x+z\times \frac{\sigma}{\sqrt{n}}](https://tex.z-dn.net/?f=x%2Bz%5Ctimes%20%5Cfrac%7B%5Csigma%7D%7B%5Csqrt%7Bn%7D%7D)
z at 95% confidence level = 1.96
Substitute the values in the formula
Confidence interval :
to ![1.95+1.96\cdot\frac{1.61}{\sqrt{16}}](https://tex.z-dn.net/?f=1.95%2B1.96%5Ccdot%5Cfrac%7B1.61%7D%7B%5Csqrt%7B16%7D%7D)
Confidence interval : 1.16 to 2.75
Hence the 95 percent confidence interval for these data is 1.16 to 2.75