Una was asked to write about predicting population means by taking the means of samples. She recorded a list of some statements generated from her classmates.Which statements are true? Select three choices.
Answer
A
The best prediction of the population mean is the value that falls between the least and greatest sample means.
B
It is unlikely that the population mean will be the least or greatest mean from the samples.
C
If the means of different samples are close in number, or have small variation, then they cannot be used to make predictions for the actual population.
D
A more accurate prediction of the population mean can be made by decreasing the number of random samples.
E
To find the range of the sample means, subtract the least value from the greatest value.