Try to answer the following questions here:

• What is this question used for?
• What does this question assess?
• What does the student have to do?
• How is the question randomised?
• Are there any implementation details that editors should be aware of?

STAT7008

### History

#### Checkpoint description

Describe what's changed since the last checkpoint.

#### Catherine Palmer1 year, 9 months ago

Created this as a copy of Sample standard deviation.
Sample standard deviation draft Newcastle University Mathematics and Statistics 20/11/2019 14:50
Sample standard deviation draft Nigel Atkins 01/03/2017 13:41
Vicky's copy of Sample standard deviation draft Vicky Hall 12/06/2017 15:08
Shortened Sample standard deviation draft Catherine Palmer 08/10/2018 09:32
STAT7008 Sample standard deviation draft Catherine Palmer 16/10/2018 21:44
STAT7008 Sample standard deviation draft Catherine Palmer 06/11/2018 21:33
Harry's copy of STAT7008 Sample standard deviation draft Harry Flynn 15/11/2018 10:01
Standard deviation draft Paul Finley 16/01/2019 13:57
Calculate the standard deviation draft Charlie Earle 28/01/2019 15:25
Practice Quiz Calculate the standard deviation draft Charlie Earle 28/01/2019 15:26
Charlie's copy of Calculate the standard deviation draft Charlie Earle 23/01/2019 16:47
Vicky's copy of Standard deviation draft Vicky Hall 05/02/2019 14:45
STAT7009 Sample standard deviation draft Catherine Palmer 12/02/2020 20:56
Palat Meethale's copy of Sample standard deviation draft Palat Meethale Ushasree 19/05/2020 19:34
Sample standard deviation draft Palat Meethale Ushasree 19/05/2020 19:34
Find the Sample standard deviation Ready to use Palat Meethale Ushasree 21/05/2020 11:21
David's copy of Sample standard deviation draft David Goulding 01/07/2020 22:34

Give any introductory information the student needs.

No variables have been defined in this question.

(a number)

Numbers between and (inclusive) with step size
A random number between and (inclusive) with step size

(text string)

(numbers)

(text strings)

This variable is an HTML node. HTML nodes can not be relied upon to work correctly when resuming a session - for example, attached event callbacks will be lost, and mathematical notation will likely also break.

If this causes problems, try to create HTML nodes where you use them in content areas, instead of storing them in variables.

Describe what this variable represents, and list any assumptions made about its value.

This variable doesn't seem to be used anywhere.

Name Type Generated Value

#### Error in variable testing condition

There's an error in the condition you specified in the Variable testing tab. Variable values can't be generated until it's fixed.

Error:

for seconds

Running for ...

Name Limit

### Penalties

Name Limit

No parts have been defined in this question.

Select a part to edit.

The correct answer is an equation. Use the accuracy tab to generate variable values satisfying this equation so it can be marked accurately.

#### Checking accuracy

Define the range of points over which the student's answer will be compared with the correct answer, and the method used to compare them.

#### Variable value generators

Give expressions which produce values for each of the variables in the expected answer. Leave blank to pick a random value from the range defined above, following the inferred type of the variable.

#### String restrictions

Both choices and answers must be defined for this part.

Help with this part type

#### Test that the marking algorithm works

Check that the marking algorithm works with different sets of variables and student answers using the interface below.

Create unit tests to save expected results and to document how the algorithm should work.

There's an error which means the marking algorithm can't run:

Name Value

Alternative used:

Note
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#### Unit tests

No unit tests have been defined. Enter an answer above, select one or more notes, and click the "Create a unit test" button.

The following tests check that the question is behaving as desired.

### This test has not been run yet This test produces the expected output This test does not produce the expected output

This test is not currently producing the expected result. Fix the marking algorithm to produce the expected results detailed below or, if this test is out of date, update the test to accept the current values.

One or more notes in this test are no longer defined. If these notes are no longer needed, you should delete this test.

Name Value

 This note produces the expected output

This test has not yet been run.

When you need to change the way this part works beyond the available options, you can write JavaScript code to be executed at the times described below.

Run this script the built-in script.

This script runs after the built-in script.

To account for errors made by the student in earlier calculations, replace question variables with answers to earlier parts.

In order to create a variable replacement, you must define at least one variable and one other part.

The variable replacements you've chosen will cause the following variables to be regenerated each time the student submits an answer to this part:

These variables have some random elements, which means they're not guaranteed to have the same value each time the student submits an answer. You should define new variables to store the random elements, so that they remain the same each time this part is marked.

This part can't be reached by the student.

Add a "next part" reference to this part from another part.

None of the parts which can lead to this part are reachable either.

### Next part options

Define the list of parts that the student can visit after this one.

• #### Variable replacements

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Variable Value

### Previous parts

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This part doesn't follow on from any others.

### Parts

#### Steps

Give a worked solution to the whole question.