Purchase Solution

T-Test for a population mean with σ unknown

Not what you're looking for?

Ask Custom Question

Consider the e-billing case. The mean and the standard deviation of the sample of n = 65 payment times are = 18.7598 and s = 3.9494. Test H0: μ = 19.1 versus Ha: μ < 19.1 by setting α equal to .01 and using a critical value rule and assume normality of the population. (Round your "t" and "t0.01" answers to 3 decimal places and p-value answer to 4 decimal places. Negative value should be indicated by a minus sign. Use a statistical software package - e.g., Minitab, MegaStat, etc., to derive the p-value.)

t= ____-.694_ (answered)
t0.01 ?? _________ ?? (prefer excel program please?)
p-value ??_________ ??

Do not reject H0 at 0.01. (answered)

Purchase this Solution

Solution Summary

The solution gives detailed steps on calculating t-statistic and p-value using t test for population mean when standard deviation is unknown.

Purchase this Solution

Free BrainMass Quizzes
Measures of Central Tendency

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

Terms and Definitions for Statistics

This quiz covers basic terms and definitions of statistics.

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.