### Define inferential statistics

Assignment Help Basic Statistics
##### Reference no: EM131524392

Answer the following questions, covering material from Ch. 13 of Methods in Behavioral Research:

1. Define inferential statistics and how researchers use inferential statistics to draw conclusions from sample data.

2. Define probability and discuss how it relates to the concept of statistical significance.

3. A researcher is studying the effects of yoga on depression. Participants are randomly assigned to one of two groups: yoga and medication (experimental group); or support group and medication (control group). What is the null hypothesis? What is the research hypothesis?

4. In the scenario described in the previous question, the researcher implements two programs simultaneously: a 6-week yoga program coupled with medication management and a 6-week support group program coupled with medication management. At the end of the 6 weeks, participants complete a questionnaire measuring depression.

The researcher compares the mean score of the experimental group with the mean score of the control group. What statistical test would be most appropriate for this purpose and why? What is the role of probability in this statistical test?

5. In the scenario described in the previous questions, the researcher predicted that participants in the experimental group-yoga plus medication-would score significantly lower on measures of depression than would participants in the control group-support group plus medication. True or false: A two-tailed test of significance is most appropriate in this case. Explain your response.

6. Explain the relationship between the alpha level (or significance level) and Type I error. What is a Type II error? How are Type I and Type II errors different?

7. A researcher is studying the effects of sex-male and female-and dietary sugar on energy level. Male and female participants agree to follow either a high sugar or low sugar diet for eight weeks. The researcher asks the participants to complete a number of questionnaires, including one assessing energy level, before and after the program.

The researcher is interested in determining whether a high or low sugar diet affects reported energy levels differently for men and women. At the end of the program, the researcher examines scores on the energy level scale for the following groups: Men - low sugar diet; Men - high sugar diet; Women - low sugar diet; Women - high sugar diet. What statistic could the researcher use to assess the data? What criteria did you use to determine the appropriate statistical test?

#### Questions Cloud

 Briefly describe a cross-cultural psychology study : Briefly described a cross-cultural psychology study that you would be interested in designing. What constitutes the option cost and the trigger strategy : Perhaps at some point in your life you have taken each of the actions a-e that follow. In doing so, you exhibited "options thinking." Discuss about cross functional team : Discuss the individual contributions that could be made by a cross-functional team to the following list of activities What are the advantages of using anecdotal records : What are the advantages of using Anecdotal Records? What disadvantages do you see and how might you overcome them? Define inferential statistics : Define inferential statistics and how researchers use inferential statistics to draw conclusions from sample data. How could two engines possibly make for efficient automobile : A hybrid automobile has two motors, gasoline and electric. It switches between motors for power, sometimes using both motors. Agency relationship in corporate financial manager : Consider the agency relationship between a corporate financial manager and the shareholders of the corporation. Question - containerization vs intermodalism : What is the difference between containerization and intermodalism? Explain in detail and provide sources to support your discussion Explain how you will implement the decision made : Analyze the problem in the scenario. Explain how you will implement the decision made and reflect on whether this option was the most effective.

### Write a Review

#### An industrial hygienist want to be able to estimate the

an industrial hygienist want to be able to estimate the level of carbon monoxide in a plant at the a 0.01 level.

#### Determines statistical significance at some fixed

The term critical value is often used to refer to the value of a test statistic that determines statistical significance at some fixed α level for a test. For example, +1.96 are the critical values for a two-tailed z-test at α = 0.05.

#### Predict the wolf population in b using the regression line

data obtained from a random sample of recent years of caribou and wolf population.caribou x 30 34 27 25 17 23 20wolf y

#### A random sample of size n is to be used to test the null

a random sample of size n is to be used to test the null hypothesis that the parameter theta of an exponential

#### If the random q has a continuous uniform distribution with

if the random q has a continuous uniform distribution with parameters a0 and b3 find the probability that the roots of

#### What sample proportion value occur-gather the sample

They hope to use a sample size such that, with probability 0.95, the error will not exceed 0.04. What sample size will ensure this, regardless of what sample proportion value occurs when they gather the sample?

#### Random sample is to be drawn from a population consisting

If a random sample is to be drawn from a population consisting of 5000 sampling units with a variance of 20% and a desired standard error of 1.6%. What is the optimal sample size?

#### Negative relationship between independent-dependent variable

Test to determine if there is a significant negative relationship between the independent and dependent variable at a = .05 and .01

#### The test scores of a class consisting of 30 students are

the test scores of a class consisting of 30 students are given in the table below. perform thenbspchi-square and the

#### Suppose that a and b are events defined on a common sample

suppose that a and b are events defined on a common sample space and that the following probabilities are known. find

#### Provide services to first-time admissions

How does the MHMR compare to the state's figures on providing services to first-time admissions - Hypothesis test for one sample mean

#### A high prevalence of heart disease

As a public health personnel, you conducted a survey and collected economic and health data on households in a township that is known to have a high prevalence of heart disease.