###
**CFA Practice Question**

A(n) ______ of a population parameter is a rule or formula that tells us how to use the sample data to calculate a single number that can be used to estimate the population parameter.

B. average

C. point estimator

A. statistic

B. average

C. point estimator

Correct Answer: C

###
**User Contributed Comments**
5

User |
Comment |
---|---|

katybo |
oops, I thought it was a statistic. |

topdan |
Statistic = Sample (S=S) Parameter = Population (P=P) |

geofin |
From Wikipedia: "An "estimator" or "point estimate" is a statistic (that is, a function of the data) that is used to infer the value of an unknown parameter in a statistical model." |

sgossett86 |
Wow, wikipedia being useful.. |

ashish100 |
geofin's got balls to cite wikipedia as the source |