An investigator wants to assess whether the use of a specific medication given to infants bom prematurely is associated with developmetal delay. Fifty infants who were given the medication and fifty comparison infants who were also born prematurely but not given the medication will be selected for the analysis. Each infant will undergo extensive testing at age 2 for various aspects of development. Identify the type of study proposed and indicate its specific strengths and weaknesses.

Q: Distinguish between observational and experimental types of studies?

A: An observational study is a study in which researchers simply collect data based on the data…

Q: An investigator wants to assess whether the use of a specific medication given to infants born…

A: The cohort study generally involves a group of individuals that meet a set of criteria at the study…

Q: It would not be ethical to assign one group of children to smoke in order to study the effect. so,…

A: given solution: one evidence can be if their parents,family members,relatives are smoking then we…

Q: A study is testing the effectiveness of a new allergy medication. Sixty people who reported they…

A: Given: Number of people who have reported allergies = 60

Q: What is the appropriate statistical test to assess whether there is an association between obesity…

A: Introduction: It is of interest to test whether an association exists between the obesity status of…

Q: Explain the difference between a no-treatment control group and a placebo control group. Why are…

A: A treatment is a stimulus that is assigned to the subjects of the experiment in order to record…

Q: What is the difference between the significance level of comparison and the alpha?

A: What is the difference between the significance level of comparison and the alpha ? For a…

Q: Researchers were interested in assessing the effects of a new treatment on seasonal affective…

A: Researchers were interested in assessing the effects of a new treatment on seasonal affective…

Q: An investigator wants to assess whether the use of a specific medication given to infants bom…

A: Cohort is a group of members who have similar characteristics or have shared a specific event during…

Q: Left ventricular mass (LVM) is an important risk factor for subsequent cardiovascular disease. A…

A: Since your question has multiple parts, we will solve first question for you. If you want remaining…

Q: Left ventricular mass (LVM) is an important risk factor for subsequent cardiovascular disease. A…

A: D (D-dbar)^2 24 26.01 -8 723.61 56 1376.41 -2 436.81 33 198.81 18 0.81 65 2125.21 9…

Q: You are part of a research team in the newly formed University of California Center for Climate,…

A: If you are interested to construct the confidence interval about the true average, the formula for…

Q: A marketing survey involves product recognition in New York and California. Of 30 New Yorkers…

A: p1 = 30/204 = 0.1471 p2 = 94/297 = 0.3165   Level of significance = 0.06

Q: he effect of the effect size on Type II errors.

A: Type II error is defined as the probability of accepting the null hypothesis when it is actually…

Q: A clinical psychologist is concerned that the social-isolation necessitated by the pandemic is…

A: Given the data as Before Self-Isolation 1 Week of Self-Isolation 2 Week of Self-Isolation 3 Week…

Q: What type of sample would be best for a company like McDonald’s which is trying to analyze how its…

A: Cluster Sampling is most appropriate for a big companies operating in different parts of the…

Q: Suppose the investigators are reluctant to assume that the change in LVM over four years is normally…

A: Solution: Given: The data consists of 10 random children from the Bogalusa Heart Study at baseline…

Q: A clinical psychologist who works with individuals also conducts research. This clinician is…

A:

Q: Imagine you are a statistical consultant and your client, a weightlifting supplement company, is…

A: Introduction: It is required to state the research question, identify the parameter, and provide the…

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: 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: The leader of two postpartum women’s support groups is interested in the depression levels of the…

A: Provided information is, the leader of two postpartum women’s support groups is interested in the…

Q: Why would the following be conducted using a Simple Anova test? You work at an alcohol and substance…

A: We would use ANOVA because

Q: Researchers investigate how the presence of cell phones influence the quality of human interaction.…

A: Given information: Researchers are interested to study the effect of the cell phones quality of…

Q: Individual actions can play a large role in the overall health of our planet. A researcher…

A: Introduction: Denote μ1, μ2 as the true population mean number of times people with a pessimistic…

Q: According to the American Lung association, lung cancer account for 28% of all cancer deaths in the…

A: A. Data collection methods: There are different kinds of data collection methods like observational,…

Q: Mental Health A study was performed looking at the effect of physical activity on cognitive function…

A: Here the given information is We hwve to find the standard deviation of exercise group and control…

Types of Bias

Statistics is the study of data collection, organization, analysis, interpretation, and presentation. Statistical bias is a characteristic of a statistical technique or its findings in which the expected value deviates from the actual root quantitative parameter being estimated. According to the actual definition of bias, it refers to the tendency of a statistic to overestimate or underestimate a parameter.