Purchase Solution

Statistics - Null and Alternative Hypothesis, Type 1 Error

Not what you're looking for?

Ask Custom Question

Some college graduates employed full-time work more than 40 hours per week, and some work fewer than 40 hours per week. We suspect that the mean number of hours worked per week by college graduates mean (mu) of a population, is different from 40 hours and wish to do a statistical test. We select a random sample of college graduates employed full-time and find that the mean of the sample is 42 hours and that the standard deviation is 4 hours.

Based on this information, answer the questions below.

what are the null and alternative hypothesis ?

type 1 eror is ?
the hypothesis that mean is?
Suppose that we decide not to reject the null hypothesis. Waht sort of error might we be making?

Purchase this Solution

Solution Summary

The null and alternative hypothesis are determined for college graduates gaining full time employment. A complete, neat and step-by-step solution is provided.

Solution Preview

(1) H0: m = 40 vs Ha: m <> 40

(2) Type I error is rejecting a ...

Purchase this Solution


Free BrainMass Quizzes
Know Your Statistical Concepts

Each question is a choice-summary multiple choice question that presents you with a statistical concept and then 4 numbered statements. You must decide which (if any) of the numbered statements is/are true as they relate to the statistical concept.

Measures of Central Tendency

This quiz evaluates the students understanding of the measures of central tendency seen in statistics. This quiz is specifically designed to incorporate the measures of central tendency as they relate to psychological research.

Terms and Definitions for Statistics

This quiz covers basic terms and definitions of statistics.

Measures of Central Tendency

Tests knowledge of the three main measures of central tendency, including some simple calculation questions.