Yes they are 
When a research question asks you to find a statistical sample mean (or average), you need to report a margin of error, or MOE, for the sample mean. The general formula for the margin of error for the sample mean is the population standard deviation, n is the sample size, and z* is the appropriate z*<span>-value for your desired level of confidence
</span>1.Find the population standard deviation and the sample size, n<span>.
</span><span>2.Divide the population standard deviation by the square root of the sample size.
</span>3.Multiply by the appropriate z*<span>-value.
HOPE WİLL HELP</span>
        
             
        
        
        
Answer:
no 
Step-by-step explanation:
 
        
             
        
        
        
Answer:
252 cm²
Step-by-step explanation:
Lateral surface area = area of the 3 triangular surfaces (the base is not included)
Area of 1 triangular face = ½*bh
b = 12 cm
h = 14 cm
Area = ½*12*14 = 6*14
Area = 84 cm²
✅Lateral surface area = 3(84) = 252 cm²
 
        
             
        
        
        
Number one is 1/2 and 2 is 2/3