The Star Proxima Centauri Has a Parallax of 0

question 238

Multiple Choice

The star Proxima Centauri has a parallax of 0.77 arcsec (the largest parallax known) . How far is this star system from the Sun in light-years? (Careful with units!)

• A) 4.24 ly
• B) 0.41 ly
• C) 1.33 ly
• D) 0.75 ly

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Definitions:

P-value

The chance of witnessing outcomes in a test that are as or more extreme than what was actually seen, assuming that the null hypothesis is true.

Significance Level

A threshold set by researchers in hypothesis testing that determines the probability of rejecting a true null hypothesis, often denoted by alpha (α).

Rejection Region

The region in the sampling distribution of a statistic that leads to the rejection of the null hypothesis.

Test Statistic

A value calculated from sample data during a hypothesis test, used to decide whether to reject the null hypothesis.