Purchase Solution

Hypothesis Test

Not what you're looking for?

Ask Custom Question

For the attached spreadsheet assume equal variances for the two populations.
A) Test the null hypothesis that the average length of service for males is the same as for females.
B) Test the null hypothesis that the average length of service for individuals without prior call center experience is the same as those with experience.
C) Test the null hypothesis that the average length of service for individuals with a college degree is the same as for individuals without a college degree.
D) Now conduct tests of hypothesis for equality of variances. Were your assumptions of equal variances valid? If not, repeat the test(s) for means using the unequal variance test.

Attachments
Purchase this Solution
Solution Summary

This solution is comprised of detailed explanation and step-by-step calculation of the given problems. Calculations have been shown both in text and EXCEL for better understanding. The solution provides students with a clear perspective of the underlying concepts.

Solution Preview

Problem:
For the attached spreadsheet assume equal variances for the two populations.
A) Test the null hypothesis that the average length of service for males is the same as for females.
B) Test the null hypothesis that the average length of service for individuals without prior call centre experience is the same as those with experience.
C) Test the null hypothesis that the average length of service for individuals with a college degree is the same as for individuals without a college degree.
D) Now conduct tests of hypothesis for equality of variances. Were your assumptions of equal variances valid? If not, repeat the test(s) for means using the unequal variance test.
Solution-A:
Step-1: Null and Alternate Hypothesis:
Null Hypothesis: The average length of service for males is the same as that for females.
:
Alternate Hypothesis: The average length of service for males is not the same as that for females.
:

Step-2: Analysis Plan:
We shall use t-test assuming equal variances to test the given hypothesis.
We shall use significance level, α=0.05.

Step-3: Critical Value and Decision Rule:
Since the alternative hypothesis is the given test is a two-tailed t-test.

Degree of freedom,
From the t-distribution table, the critical value of the test statistic for a two-tailed test at and is given as

Decision Rule:
Reject if

Step-4: Test Statistic:
t-Test: Two-Sample Assuming Equal Variances

Male Female
Mean 1.76081 2.01318
Variance 0.73519 1.62713
Observations 33 37
Pooled Variance 1.20739
Hypothesized Mean Difference 0
df 68
t ...

Solution provided by:
Anwesha Ghosh, MSc
Education
  • MSc, Osmania University
  • MSc, Indian Institute of Technology - Roorkee (I.I.T.-ROORKEE)
  • BSc, Banaras Hindu University
Recent Feedback
  • "Very fast turnaround. Excellent communication! Much appreciated!"
  • "excellent"
  • "excellent"
  • "excellent work"
  • "Fantastic..great solution and very well explained!!!!"
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.

Terms and Definitions for Statistics

This quiz covers basic terms and definitions of statistics.

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.

Measures of Central Tendency

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

View More Free Quizzes
Related BrainMass Solutions

  • Left-Tailed, Two-Tailed, and Right-Tailed Testing

    If the alternative hypothesis is left directional, in other words, if we test the null hypothesis H0 : θ = θ0¬ against the alternative hypothesis H1 : θ < θ0¬¬, then this hypothesis test is called the left-tailed test.

  • Hypothesis Testing

    Claim the null hypothesis is valid C. Fail to reject the null hypothesis D. Claim the alternative hypothesis is true 6. A hypothesis test is used to test a claim.

  • The Purposes of a Hypothesis Test

    If you can, check that the assumptions necessary to do a hypothesis test are satisfied, do the test, and state your conclusion. hypothesis test What is the purpose of a hypothesis test?

  • Hypothesis test: sample of 100

    460193 Hypothesis test: sample of 100 Consider the following hypothesis test: HO: µ ≥ 80 Ha: µ < 80 A sample of 100 is used and the population standard deviation is 12.

  • Regression Hypothesis Test

    354910 Regression Hypothesis Test Methods Regression Hypothesis Test using Education vs. Experience and their relation to Salary Earnings: a. Formulate a hypothesis statement regarding your research issue.

  • Hypothesis Testing

    178637 Hypothesis Testing Please see the attached file. A hypothesis test is used to test a claim. You get 1.75 as your test statistic and 1.59 as your critical value for a right-tailed test.

  • Sample data to test the hypothesis with a two tailed test

    The expert examines sample data to test the hypothesis with a two tailed test.

  • Hypothesis Testing Using Normal Distribution

    Two-tailed test, n = 12, a = 0.05 Z Test hypothesis tests are also explain in charts in Excel attachment . Use the given claim to state a null and an alternative hypothesis. Identify which hypothesis represents the claim. Answers A.

  • Statistics and Hypothesis Testing Problems

    Null hypothesis: µ=640.6 Alternative hypothesis: µ≠640.6 This is a two tailed t test.

  • 5 Step Hypothesis Test

    388291 5 Step Hypothesis Test Test the null hypothesis that a population mean is 50 against the alternate hypothesis that the mean is not 50. The data is of ratio level.

View More Related Solutions