Purchase Solution

Replicate research, risk in volunteer samples, percentages t

Not what you're looking for?

Ask Custom Question

1. What does it mean to replicate research, and how does this impact our confidence?

2. What is the risk associated with volunteer samples?

3. What is the difference between null hypothesis and a research hypothesis?

4. Convert the following percentages to proportions: 62.7%; 0.3%; 4.2%.

Purchase this Solution
Solution Summary

Solution provides answers to questions, as well as steps necessary to calculate percentages to proportions.

Solution Preview

1. If you replicate research you will do the same study multiple times. Normally in practice you will only perform a study once and you don't know if the particular interval is correct; therefore if replicate the research your confidence will improve.

2. The risk associated with ...

Purchase this Solution
Free BrainMass Quizzes
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.

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.

View More Free Quizzes
Related BrainMass Solutions

  • Determining Statistical Sgnificance and Random Distribution

    Two sample t-test between percents This test can be used to compare percentages drawn from two independent samples. It can also be used to compare two subgroups from a single sample.

  • Risk of criminal violence article

    One would need the more specific data that is released by communities, states, and the Dept. of Justice to replicate the research. A review of an article on risk of being involved in criminal violence based on time, place, and activity.

  • Difference between paired t teat & independent sample t test

    Student's t test for independent samples is used to determine whether two samples were drawn from populations with different means. When one randomly takes replicate measurements from a population he/she is collecting an independent sample.

  • five step process for hypothesis testing

    In case two samples are related, we use paired t-test (Hypothesis Testing, 2001).

  • Article Summary on Statistical Analysis

    In order to identify patterns of job satisfaction and stress by demographic, job, and practice characteristics, the two independent samples t-test is used for normally distributed variables, the two independent samples Mann-Whitney test is used for not

  • Binomial tree, Time to harvest, Market risk

    the call option, have the risk free asset=X e -rΔt and be short on stock where X is the exercise price d) Use the relationship you derived in part c to find the price of the put option rf=risk free rate=

  • z test and t test examples for psychological questions

    Suggest one psychological research question that could be answered by each of the following types of statistical test: * z test * t test for independent samples, and t test for dependent samples Hi there, Thanks for selecting me as your OTA.

  • Estimating total body weight

    Mean differences in replicate measures of TBW are about 1.0 l (SD = 0.6 l). Total body water has been measured in the Lifespan Health Research Center since 1987.

  • 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