I'm currently studying for a Statistics final, and I'm stuck at some problems. I'd appreciate any help I could get.(adsbygoogle = window.adsbygoogle || []).push({});

Question #1

Determine the minimum sample size needed to estimate a population mean with a margin of error of 24 and a confidence level of 95%, if the population standard deviation is 234.

n = ?

Question #2

Professors seem to believe that students score better on exams on Tuesdays, Wednesdays, and Thursdays than on Mondays or Fridays. A sample of the number of A and B grades achieved by a class on various days, Monday through Friday, is 15, 18, 17, 22, 16. A test is made of the claim, at a significance level of 0.05, that A and B grades occur with equal frquency on all days.

What is the test statistic?

What is the critical value?

**Physics Forums - The Fusion of Science and Community**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Few questions

Loading...

Similar Threads - questions | Date |
---|---|

I Question about simplifying Sigma notation | Feb 11, 2018 |

I Shopping List Game: Probability Question | Dec 10, 2017 |

I A simple question about probability theory | Aug 2, 2017 |

B Correlation question | Jun 20, 2017 |

I Tough probability question | Jun 7, 2017 |

**Physics Forums - The Fusion of Science and Community**