New Zealand
Level 7 - NCEA Level 2
Standard Deviation using sample population
Interactive practice questions
Find the following based on this set of scores:
$19,18,14,19,10$19,18,14,19,10
a
Find the mean.
b
Complete the following table.
| Score($x$x) | $(x-$(x−mean$)$) | $(x-$(x−mean$)^2$)2 |
|---|---|---|
| $19$19 | $\editable{}$ | $\editable{}$ |
| $18$18 | $\editable{}$ | $\editable{}$ |
| $14$14 | $\editable{}$ | $\editable{}$ |
| $19$19 | $\editable{}$ | $\editable{}$ |
| $10$10 | $\editable{}$ | $\editable{}$ |
c
Thus, find the sample standard deviation, correct to 2 decimal places.
d
Find the range of the set of scores.
Easy
7min
Consider the set of scores below:
$41,-15,-7,10,26$41,−15,−7,10,26
Easy
5min
Find the sample standard deviation of the following set of scores, correct to two decimal places, by using the statistics mode on the calculator:
$13,4,11,8,9,11,2,6,15,3$13,4,11,8,9,11,2,6,15,3
Easy
1min
Find the sample standard deviation of the following set of scores, correct to two decimal places, by using the statistics mode on the calculator:
$9,5,-14,8,1,3,-6,-16,8,-17$9,5,−14,8,1,3,−6,−16,8,−17
Easy
1min
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