Where Are the Cepheid and RR Lyrae Variable Stars Located

question 33

Multiple Choice

Where are the Cepheid and RR Lyrae variable stars located on the H-R Diagram?

• A) just above and to the right of B type stars
• B) just above and to the right of O type stars
• C) in the variable strip
• D) in the instability strip
• E) outside the H-R Diagram as missing items

---

Definitions:

Chi-Squared Distribution

A statistical distribution that is used to describe the distribution of a sum of the squares of k independent standard normal variables, commonly used in hypothesis testing.

Chi-Squared Distributed

Referring to a statistical distribution that arises from the sum of the squares of variables that follow a standard normal distribution.

Degrees of Freedom

The number of values in a statistical calculation that are free to vary, often linked to the size of the data set.

P-Value

The probability that the observed data would occur if the null hypothesis were true, used as a measure to decide whether to reject the null hypothesis.