Welcome Guest Search | Active Topics |

Tag as favorite
practise set 7 #10
Brittany_6462
#1 Posted : Friday, May 28, 2021 8:05:01 PM
Rank: Member

Groups: Registered
Joined: 4/20/2021
Posts: 19

Thanks: 0 times
Was thanked: 0 time(s) in 0 post(s)
I am confused what sort of information should I be using from the table to answer this questions. I thought the passage said there was no correlation?
INSTR_Katrina_128
#2 Posted : Sunday, May 30, 2021 5:07:19 PM
Rank: Advanced Member

Groups: Registered
Joined: 5/18/2021
Posts: 60

Thanks: 0 times
Was thanked: 0 time(s) in 0 post(s)
This is a really tricky question. It helps if you've taken a stats course before and have done hypothesis testing. Otherwise, it's just... weird. 😐

The main thing to focus on is the value of p = 0.197 or 19.7%.

With hypothesis testing, we are trying to test some sort of hypothesis (duh?).

There is always a NULL hypothesis and an ALTERNATIVE hypothesis. In the case of a correlation, these would be:

NULL HYPOTHESIS: There is NO correlation between the two variables.
ALTERNATIVE HYPOTHESIS: There IS a correlation between the two variables.

Then, we need to choose a "confidence level" with which we want to be certain of our results. A value of 95%-confidence is pretty popular, and is usually a good place to start if you don't know what to choose. But, if you're given some data (like a p-value or probability-value), you can also look there.

Note that if we have 95% confidence, then we have 5% doubt. Or, if we have 90% confidence, then we have 10% doubt.

Here's the big thing to remember: IF THE P-VALUE IS SMULL, REJECT THE NULL. (I've written it stupidly on purpose).

So, if we set our level of confidence at 80% (which means we have 20% doubt), then we can reject the null hypothesis and conclude that the variables are correlated with each other BECAUSE our p-value is LESS than our doubt value of 20%. Since the p-value is SMULL we reject the null.

πŸ˜πŸ˜‘πŸ˜ΆπŸ™„

Need a master's degree in stats to do this one... 😫
Users browsing this topic
Guest
Tag as favorite
You cannot post new topics in this forum.
You cannot reply to topics in this forum.
You cannot delete your posts in this forum.
You cannot edit your posts in this forum.
You cannot create polls in this forum.
You cannot vote in polls in this forum.

Clean Slate theme by Jaben Cargman (Tiny Gecko)
Powered by YAF | YAF © 2003-2009, Yet Another Forum.NET
This page was generated in 0.092 seconds.