The heights (in cm) of a population of 3 people are $A$A, $B$B and $C$C.
List all possible samples of size 2 without replacement. For example if the first 2 are selected we can write that as $AB$AB.
Use commas to separate different samples.
If $A=171$A=171, $B=153$B=153 and $C=162$C=162, complete the following table:
Sample Values (cm) | Sample Mean |
---|---|
$171$171, $153$153 | $\editable{}$ cm |
$171$171, $162$162 | $\editable{}$ cm |
$153$153, $162$162 | $\editable{}$ cm |
What is the mean of the distribution of all possible sample means?
What is the population mean?
Is the mean of the sample means equal to the population mean?
Yes
No
The heights (in cm) of a population of 3 people are $A$A, $B$B and $C$C.
The weights (in kg) of a population of 5 people are F, G, H, I and J.
The weights (in kg) of a population of 5 people are $F$F, $G$G, $H$H, $I$I and $J$J.
Understand statistics as a process for making inferences about population parameters based on a random sample from that population.
Use data from a sample survey to estimate a population mean or proportion; develop a margin of error through the use of simulation models for random sampling.