Purchase Solution

Hypothesis Testing of Proportions: Two sample Z Test

Not what you're looking for?

Ask Custom Question

A committee studying employer-employee relations proposed that each employee would rate his or her immediate supervisor and in turn the supervisor would rate each employee. To find reactions regarding the proposal, 120 office personnel and 160 plant personnel were selected at random. Seventy-eight of the office personnel and 90 of the plant personnel were in favor of the proposal. Computed z = 1.48. At the 0.05 level, it was concluded that there is sufficient evidence to support the belief that the proportion of office personnel in favor of the proposal is greater than that of the plant personnel

True or False

and if you can provide the solution steps. thank you

Purchase this Solution
Solution Summary

The solution provides step by step method for the calculation of testing of hypothesis. Formula for the calculation and Interpretations of the results are also included. Interactive excel sheet is included. The user can edit the inputs and obtain the complete results for a new set of data.

Solution Preview

Please see the attachments.

Hypothesis testing
A committee studying employer-employee relations proposed that each employee would rate his or her immediate supervisor and in turn the supervisor would rate each employee. To find reactions regarding the proposal, 120 office personnel and 160 plant personnel were selected at random. Seventy-eight of the office personnel and 90 of the plant personnel were in favor of the proposal. Computed z = 1.48. At the 0.05 level, it was concluded that there is sufficient evidence to support the ...

Purchase this Solution
Free BrainMass Quizzes
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.

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.

View More Free Quizzes
Related BrainMass Solutions

  • Hypothesis Testing of Proportions

    Details Z Test for Differences in Two Proportions Data Hypothesized Difference 0 Level of Significance 0.05 Group 1 Number of Successes 257 Sample Size 437 Group 2 Number of Successes 39 Sample Size 179 Intermediate Calculations

  • Hypothesis Testing, Z-Tests and T-Tests

    165535 Hypothesis Testing, Z-Tests and T-Tests A. Select a variable. Compare the mean of the variable for a sample of 30 for one group with the mean of the variable for a sample of 30 for a second group. Use a z test. B. Select a variable.

  • When to use a t-test and when to use a z-test

    In all cases, use a two-sided test when you are testing the hypothesis that two means (or two proportions) are not equal, and use a one-sided test when you are testing the hypothesis that one mean is greater than or less than the other.

  • Sample Hypothesis Testing

    =NORMSDIST(-0.7) Explanation: Here the null and alternative hypothesis are H0: p= 0.35 and H1:p < 0.35 Thus the p-value = P[Z < test statistic value] = P[Z < -0.7] 3) d. null hypothesis states that the two population proportions are equal 4)

  • Hypothesis Testing: Two sample Z test for proportion

    328207 Hypothesis Testing: Two sample Z test for proportion 1.To compare the effectiveness of two treatments 1 and 2 for a particular disease. Patients were separated in 2 treatment groups.

  • Test of hypothesis: difference between proportions

    of residents in support of stadium in LA and the rest of the country respectively n1,n2= sample sizes We will carry out a one tailed test for differences between proportions (since we are testing p1>p2 ; if we were testing p1not equal

  • Hypothesis Testing Exercise

    The output will have the test statistic (z), p-value (p), sample p values, weighted p ( ), then repeat of sample sizes. For StatCrunch, we will select Stat > Proportions > Two Sample > with summary.

  • Hypothesis testing problems using Z and t test

    224109 Hypothesis testing problems using Z and t test The Board of Surgeons recommends a postoperative examination six months after a prostatectomy.

  • proportion testing for SAT scores

    Details Z Test for Differences in Two Proportions Data Hypothesized Difference 0 Level of Significance 0.05 Hard Rock High School Number of Successes 75 Sample Size 100 Preppy Magnet Number of Successes 20 Sample Size 25 Intermediate

View More Related Solutions