Purchase Solution

TWO SAMPLE TESTS OF HYPOTHESIS

Not what you're looking for?

Ask Custom Question

Please help me with the following problems. There are a few I'm having trouble with. Please use EXCEL and show me a step by step solution to give me a full understanding. Thanks a lot!

#1 A financial analyst wants to compare the turnover rates, in percent, for shares of oil-related stocks versus other stocks, such as GE and IBM. She selected 32 oil-related stocks at 49 other stocks. The mean turnover rate of oil-related stocks is 31.4 percent and the standard deviation 5.1 percent. For the other stocks, the mean rate was computed to be 34.9 percent and the standard deviation 6.7 percent. Is there a significant difference in the turnover rates of the two types of stocks? Use the .01 significance level.

#2 The Tampa Bay (Florida) Area Chamber of Commerce wanted to know whether the mean weekly salary of nurses was larger than that of school teachers. To investigate, they collected the following information on the amounts earned last week by a sample of school teachers and nurses.

School Teachers ($) 845 826 827 784 809 820 829 830 842 832

Nurses ($) 841 890 821 771 850 859 825 829

Is it reasonable to conclude that the mean weekly salary of nurses is higher? Use the 0.1 significance level. What is the p-value?

#3 The Engineering Department at Sims Software, Inc., recently developed two chemical solutions designed to increase the usable life of computer disks. A sample of disks treated with the first solution lasted 86, 78, 66, 83, 84, 109, 65 an 102 hours. Those related with the second solution lasted 91, 71, 75, 76, 87, 79, 73, 76, 79, 78, 87, 90, 76, and 72 hours. At the .10 significance level, can we conclude that there is a difference in the length of time the two types of treatment lasted?

Purchase this Solution
Solution Summary

This Solution contains calculations to aid you in understanding the Solution to these questions.

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.

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.

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.

Terms and Definitions for Statistics

This quiz covers basic terms and definitions of statistics.

View More Free Quizzes
Related BrainMass Solutions

  • Hypothesis testing problems :MCQ

    432211 Statistics - One & Two Sample Tests of Hypothesis Need help with 20 questions on One-Sample and Two-Sample Tests of Hypothesis. Please see the answers Answers to multiple choice questions from hypothesis testing are included in the answers

  • Relevance of One-Tailed and Two-Tailed Tests

    147336 Relevance of One-Tailed and Two-Tailed Tests Discuss in one short paragraph the relevance of one-tailed and two-tailed tests with alternate hypothesis.

  • ANOVA: The Meaning of F = 1 and Two Sample T-Tests

    233415 ANOVA: The Meaning of F = 1 and Two Sample T-Tests In ANOVA, what does F=1 mean? What are the differences between a two sample t-test and ANOVA hypothesis testing?

  • Independent Sample/F Distribution/Type I Error

    ANOVA tests equality of means for more than two populations, whereas the two-sample t-test for mean tests for equality of means of only two populations. c.

  • Testing of Hypothesis

    97982 Hypothesis Testing Using the same data set used for you Hypothesis Testing Paper in Week Two, paper describing a new hypothesis test using a different statistic (e.g., large sample size, small sample size, means and/or proportions, one-and two-tailed

  • Analysis of Variance - ANOVA Problem

    (Note that the formulas for computing s, t and/or z in the case of a two-sample test are different than the formulas for computing the same values in a one-sample test. Use Excel data analysis to conduct tests comparing two sample means.)

  • Statistics: Hypothesis Testing and Differentiating Between Samples

    (1) We would use one-sample hypothesis test when we want to test for a population parameter, whereas we use two-sample hypothesis test when we want to compare the two samples that may be drawn from a single or two different populations.

  • Hypothesis Testing, Statistical Inference, and Regression Analysis

    What are the differences between one- and two- sample hypothesis tests? Describe the correct mathematical form for specifying the null and alternative hypotheses for both types of tests.

  • Multiple choice questions

    Hypothesis tests can be used to relate to: a. tests of strengths b. tests of association c. tests of differences d. b and c are correct Answer: c. tests of differences 9.

  • Small vs large samples

    This 630 word solution compares hypothesis tests for large and small samples and in particular compares p-values of the tests to evaluate which test is more signficant.

View More Related Solutions