273 E4 - Correlations

strength, direction

Correlations will tell you the _____ and _____ of a relationship

correlation

What test is applied?

A team physician wants to know whether athletes who report getting more sleep tend to have fewer symptoms immediately after a mild TBI.

There is not a relationship between sleep and tmbi symptoms.

A team physician wants to know whether athletes who report getting more sleep tend to have fewer symptoms immediately after a mild TBI.

what is the null?

inverse, as sleep increases, symptoms decrease

A team physician wants to know whether athletes who report getting more sleep tend to have fewer symptoms immediately after a mild TBI.

What is the expected relationship?

We fail to reject the null hypothesis [r(num) = -0.490, p = 0.064], there is not a relationship between sleep and tbi symptoms.

A team physician wants to know whether athletes who report getting more sleep tend to have fewer symptoms immediately after a mild TBI.

Output

r = -0.490

p = 0.064

correlation

Which test is applied?

A sports psychologist is interested in whether athletes who report higher stress levels experience greater cognitive impairment following a concussion.

There is not a relationship between stress level and cognitive impairment.

A sports psychologist is interested in whether athletes who report higher stress levels experience greater cognitive impairment following a concussion.

What is the null?

We fail to reject the null hypothesis [r(num) = -0.158, p =0.574], there is not a relationship between stress levels and cognitive impairment.

A sports psychologist is interested in whether athletes who report higher stress levels experience greater cognitive impairment following a concussion.

Output:

r = -0.158

p = 0.574