# Christopher Graham

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## Christopher's activity

#### Christopher Graham on Perform a paired sample t-test 1 week, 4 days ago

Though you could use $\dots$, the important thing is that it demonstrates the method and I don't think you need all of the terms to do that. Also needs

`\simplify{}`

in that expression to avoid double minus signs.You could consider reducing the sample size, which would also make part (a) less laborious for the student.

You can use

`dpformat(n,d)`

to format a number n to d decimal places in the advice.I think we need to think a little more about the context: what is the test / what are the units? What is the handedness of the individuals? (You could also refer to dominant/nondominant to avoid right/left) And do we need to bias the results to reflect that?

#### Christopher Graham on Perform a paired sample t-test 1 week, 4 days ago

Gave some feedback: Has some problems

#### Christopher Graham on One sample t-test -SES 2 weeks, 5 days ago

Thanks Lauren, can you check with Phil regarding the wording of the last part. I

think(I'm no statistician) that you are not supposed to "accept" a null hypothesis, rather you "do not reject" it.

#### Christopher Graham on One sample t-test -SES 3 weeks, 1 day ago

Hi Lauren, can you move this into the sports science project please.

You've left it a bit in the air whether you are testing the student on which type of test to use. A t-test is implied in part (d), so I would either remove that to just say "test statistic" and start the question with a multiple choice asking which type of test is appropriate, or perhaps just state explicitly that the method will be to use a t-test in the statement.

I would split (d) into two parts, one to identify the significance level (also multiple choice) and the second to draw a conclusion from it.

You should split the advice by parts to help the student to easily digest the information.

#### Christopher Graham on One sample t-test -SES 3 weeks, 1 day ago

Gave some feedback: Has some problems

#### Christopher Graham on Find the equation of a line through two points - positive gradient 4 weeks, 1 day ago

Fixed bug in correct line plot, caused by reading wrong student answer box (must have had a part added)

#### Christopher Graham on Add two numbers 4 weeks, 1 day ago

Great question!

#### Christopher Graham on Add two numbers 4 weeks, 1 day ago

Gave some feedback: Ready to use