# Thread: "Easy" regression/hypothesis test questions

1. ## "Easy" regression/hypothesis test questions

Dear community, I'm having trouble with some basic regression questions.

1)

Test the null H0: Intercept = 0.

If -95% confidence interval = -0.004, +95% confidence invterval = 0.0041, do I accept the null hypothesis at ALPHA = 0.05 that Interval = 0?

2)

Is the error term = the difference between YActual and YResidual (which is provided by the excel regression output).

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Thankyou for any help.

2. ## Re: "Easy" regression/hypothesis test questions

Hi, welcome to the forum. Please have a look over posting guidelines: http://www.talkstats.com/announcement.php?f=2

What work have you done so far to try and figure these questions out?

3. ## Re: "Easy" regression/hypothesis test questions

What I have done:

Calculated the 95% confidence interval for each Intercept.

The outputted intercepts are all extraordinarily close to 0 (such as 1.8E-18).

"0" lies within the intercept's confidence intervals. Since this is the case, does that mean that

H0: Intercapt = 0 is accepted?

4. ## Re: "Easy" regression/hypothesis test questions

Originally Posted by imiyakawa
What I have done:

Calculated the 95% confidence interval for each Intercept.

The outputted intercepts are all extraordinarily close to 0 (such as 1.8E-18).

"0" lies within the intercept's confidence intervals. Since this is the case, does that mean that

H0: Intercapt = 0 is accepted?
You're correct in thinking that this indicates a (just) non-significant result; you should not reject the null hypothesis. (Unless CI's and p values can provide differing conclusions in the one sample regression case - any takers?)

But it's not ever really correct to say that you "accept" a null hypothesis. A non-significant result only means that one has not found evidence to reject the null hypothesis. It doesn't mean the null is true.

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