7. Inferential Statistics
7.02 Estimating proportions from samples
Interactive practice questions
The heights (in cm) of a population of 3 people are $A$A, $B$B and $C$C.
a
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.
b
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 |
c
What is the mean of the distribution of all possible sample means?
d
What is the population mean?
e
Is the mean of the sample means equal to the population mean?
Yes
A
No
B
Easy
4min
The heights (in cm) of a population of 3 people are $A$A, $B$B and $C$C.
Easy
6min
The weights (in kg) of a population of 5 people are F, G, H, I and J.
Easy
2min
The weights (in kg) of a population of 5 people are $F$F, $G$G, $H$H, $I$I and $J$J.
Medium
5min
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