Friday
August 1, 2014

Homework Help: Statistics

Posted by Kate on Tuesday, March 9, 2010 at 9:19pm.

A student group claims that first-year students at a university must study 2.5 hours (150 minutes) per night during the school week. A skeptic suspects that they study less than that on the average. A class survey finds that the average study time claimed by 269 students is = 144 minutes, with a sample standard deviation of 70.

A) Regard these students as a random sample of all first-year students and suppose we know that the study times follow a Normal distribution. What is the standard error of the sample mean?

B) Consider the hypotheses H0: μ = 150 against Ha: μ < 150. What is the value of the test statistic? Give your answer to two decimal places.

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Statistics - A class survey in a large class for first-year college students ...
statistics - A sample of the number of study per week of college students is ...
Statistics - 28. A group of statistics students decided to conduct a survey at ...
statistics - Among the 500 first year students of college, 270 students study ...
statistic - 1. Compute descriptive statistics for liberal art colleges and ...
Statistics - A group of statistics students decided to conduct a survey at their...
Statistics - A group of statistics students decided to conduct a survey at their...
statistics - A group of statistics students decided to conduct a survey at their...
Research - I would like to have your input on the following questions. (1) Why ...
statistics - You and three (3) of your friends were in the same advance ...

Search
Members