Purchase Solution

Confidence interal, standard error, Cohen's d, Type II

Not what you're looking for?

Ask Custom Question

8.4. What are the five steps to create a confidence interval for a z distribution?

8.6. What effect does increasing the sample size have on the standard error and the test statistic for every hypothesis test?

8.8. What does it mean to say the effect-size statistic, such as Cohen's d, neutralizes the influence of sample size?

8.10. Why is it useful to calculate Prep in addition to, or instead of, a p value?

8.12. How does power relate to Type II errors?

8.14. Explain how increasing alpha increase power?

Purchase this Solution
Solution Summary

This solution provides detailed explanation of the given statistics questions.

Solution Preview

I have attached a Word document that explains these questions.
** Please see the attached file for the complete solution response **

8.4) The first step that you need to do is to calculate the sample mean so that you can estimate the mean of the population. This is done by: (please see the attached file). The next second step is to calculate the sample standard deviation, or standard error. This is done by: (please see the attached file). The third step is to get the Z for the confidence interval; this can be done by using a calculator or a table. For example, a 95% confidence interval ...

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.

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.

View More Free Quizzes
Related BrainMass Solutions

  • Statistics symbols, confidence intervals, z test

    It should be σm because it is the standard error of the mean and not the standard deviation of the population. (b) d = M - µ σМ The incorrect symbol is σM.

  • Hypothesis Test Questions

    What are the consequences of making a Type II error in this scenario? d. In this scenario, is a Type I or Type II error more serious? Or, are they equally serious? Explain your reasoning. e.

  • Normal Distribution, Hypothesis tests

    Answers questions on Normal Distribution, Hypothesis tests, Type I and Type II errors, critical region, significance level, sample size, Cohen's d etc.

  • Type I error, Type II error, confidence interval

    179564 Type I error, Type II error, confidence interval 1. A Type II error is committed when a) we reject a null hypothesis that is true. b) we don't reject a null hypothesis that is true. c) we reject a null hypothesis that is false.

  • Fundamental Statistics

    Type II error: We fail to reject that there no a difference in the number of relevant results in the search engines when there actually is a difference.   16) a) sp2 = (49 *3.402 + 49 * 3.562 ) / 98 = 12.1168 standard error of the difference =

  • Type 2 Error

    type ii error is 0.1047. b) this is a left tailed test.

  • T-Test, Effect Size, Power

    That means that there is a 0.21% type II error rate.

  • Hypothesis Testing, Power of Hypothesis Testing & Cohen's d

    =24 what value would be obtained for Cohen's d? How does the standard deviation influence the measure of effect size? d. If the sample mean were M =56, what value would be obtained for Cohen's d?

  • Standard normal distribution multiple choice

    the difference between type I error and type II error d. the difference between z value and mean 6.

View More Related Solutions