Researchers conducted a study to assess the effect of an education campaign in increasing knowledge of Treatment as Prevention as a method of preventing transmission of HIV. Each participant's knowledge was assessed before and after a brief education campaign. Knowledge was assessed using a seven-point scale where 1 represents low knowledge and 7 represents high knowledge State the null hypothesis and alternative hypothesis for this study.  b) What test is appropriate to test your null hypothesis? Why is this test appropriate? Provide supporting figures and/or statistics to justify your decision.

Q: Which of these sounds like a situation where you would want to use an Independent-Measures ANOVA?…

A: The Method ANOVA is used to check the significant mean difference between 3 groups (or) more than 3…

Q: A volleyball coach wants to test two different methods of practice for serving and determine if one…

A: Here, there are two samples. If the two samples are not related to each other, then independent…

Q: A study of seat belt users and nonusers yielded the randomly selected sample data summarized in the…

A: Answer: To calculate the value of chi-square test statistics.

Q: standardized exam consists of three parts: math, writing, and critical reading. Sample data showing…

A: Given that  Sample size n=12 Degree of freedom =df = n-1=11 NOTE:- According to bartleby guidelines…

Q: What is the difference between a fixed effect factor and a random effect factor?

A: The fixed effect factor is defined as when data has been gathered from all the levels of the factor…

Q: When a null hypothesis is rejected, the test is said to be "statistically significant." If a…

A: Here Given  When a null hypothesis is rejected, test is said to be "statistically significant

Q: What does it mean if the cases are not selected randomly but are assigned randomly to groups?

A: “Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: OxyContin The drug OxyContin (oxycodone) is used to treat pain, but it is dangerous because it is…

A: Solution:Given that,Level of significance = 0.05Sample size(x) = 52Total (n) =227

Q: Suppose the Humane Society claims that 30% of U.S. households own cats. You believe your community…

A:

Q: Health insurance benefits vary by the size of the company (the Henry J. Kaiser Family Foundation…

A: a:For the given data, the chi-square test for association is appropriate.Null Hypothesis:H0: The…

Q: A psychology professor was interested in which study strategy was most effective for her students.…

A: In this question we will be answering all the parts and then analyzing the result obtained in form…

Q: What is the formula for STANDARDIZED EFFECT SIZE, COHEN’S d (TWO INDEPENDENT SAMPLES)?

A:

Q: 4. Children who entered kindergarten at age 5 were compared with children who entered kindergarten…

A: Regression Analysis:                Regression Analysis helps to estimate the…

Q: 19% of deaths among male adults can be attributed to heart diseases. Is this percentage different…

A: Solution: It is given that 19% of deaths among male students can be attributed to heart diseases.

Q: In order to evaluate the effects of stress on the development of stomach ulcers, three separate…

A: It is given in this study three separate groups of monkeys were taken.

Q: What type of statistical study is most likely to lead to an answer to the following questions? If…

A: In this context, the aim to identify the type of statistical study that is most likely to lead the…

Q: Whirling disease is a deadly disease that affects trout in Montana riversIn a follow-up to a 2006…

A: The relative risk of whirling disease for rainbow trout compared to brown trout can be calculated as…

Q: Show the difference between two approaches to significance testing?

A: The two approaches to significance testing are p-value approach and critical value approach.

Q: Some researchers investigate whether playing construction toys helps children to develop spatial…

A: Explanatory variable is the variable that causes the changes in the other variables. While the…

Q: Question 1 Are teacher evaluations independent of grades? Affter midterms, a random sample of 284…

A: The hypothesis are  H0:teacher evaluation are independent of mid term grades H1:teacher evaluation…

Q: An epidemiologist found five cases of “big toe cancer” in the Yukon Territory. Because there were…

A: Note: Since we are authorized to answer only up to 3 subparts, we are answering first three…

Q: Below indicate whether the appropriate test would be an independent t-test, dependent t-test,…

A:

Q: A marketing agency wanted to determine if a new commercial changed people's opinion about a company.…

A: Statistical hypothesis means the decision about a population parameter. Here we look at the data we…

Q: This is a basic statistic used in Meta-analysis and is used to measure meaningfulness of an outcome:…

A: 1. Effect size is a number measures  the strength of the relationship between two variables in any…

Q: What is the distinguishing feature of a case-control study such as this? An epidemiologist performed…

A: We are interested in the how this study is performed.

Q: A researcher is studying the effects of his newly created lens on vision. He samples 9 people with…

A: Given data: Participant  With Lens Without Lens 1 8 14 2 6 17 3 9 12…

Q: Researchers examined whether playing motion-sensing versus non-motion sensing games would affect…

A:

Q: You may need to use the appropriate technology to answer this quest Periodically, customers of a…

A: From the information, given that

Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.