Calculating P values for given t value in R

Question

Ques: What is the p-value for the two-tail test(assuming 5% confidence interval) of the hypothesis that the equation intercept is zero?

I have calculated the t value(1.257) for a data set with 51 observations in a linear regression model. Its Degree of freedom is 49.Now how can I calculate the p value based on the above information in R?

In order to improve the quality of your question, it is better to prepare a [reproducible example](https://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reproducible-example) — Kevin Arseneau, Sep 12 '17 at 22:27
I think the information is sufficient to calculate the p value ... — mayank jindal, Sep 12 '17 at 22:57
there is no need of data set as i have mentioned the degree of freedom in the question. — mayank jindal, Sep 12 '17 at 22:58

s_baldur · Answer 1 · 2020-09-30T09:01:10.723

2

You probably want to use the cumulative distribution function pt.

t <- 1.257
df <- 49
2 * (1 - pt(q = abs(t), df = df))
[1] 0.2147125

or alternatively:

2 * pt(q = abs(t), df = df, lower=FALSE)

edited Sep 30 '20 at 09:01

answered Sep 12 '17 at 23:32

s_baldur

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Calculating P values for given t value in R

1 Answers1