Answer:
I think its k so try that but if it douse not worckd the try b
What does the 7-5 mean at the end?
Every 30 mins the water level goes up by 15 inches
In standard form it would be 8,000,309
Answer:
The standard error of the sample mean is 
Step-by-step explanation:
From the question we are told that
The population mean is 
The population standard deviation is 
The sample size is 
Generally the standard error of the sample mean is mathematically represented as

substituting values

