True or false: if you did a retrospective study to determine the risk of disease for individuals exposed to some viral agent, you would need to start with individuals who were exposed to the agent

Q: What is the difference between preventative measures and preventative statistics of a disease

A: preventive  healthcare or preventive  medicine refers to the measures taken in order to prevent and…

Q: QUESTION 8 What is your suggestion that the clinic can do to reduce the chance of making both Type I…

A: We have to know how to reduce the type 1 error and type 2 error.

Q: How are total risk, non-diversifiable risk, and diversifiable risk related? Why is non diversifiable…

A: The total risk of a security is the combination of non diversifiable risk and diversifiable risk.…

Q: True or False? The data collected in a biostatistics study can be applied to any population…

A: The data collected in a biostatistics study can be applied to any population regardless of race,…

Q: Define the term of Experimental Error ?

A:

Q: A case-control study was conducted to evaluate the relationship between aspirin use and the risk of…

A: An odds ratio quantifies the strength of the association between two events A and B. It is defined…

Q: If the Cl on the difference between two means does not include 0, we can conclude that there is a…

A: True

Q: In AÑOVA, when we want to "control for" variation in the response variable that is due to a factor…

A: Randomised block ANOVA; The aim is to minimize the variance among units within blocks relative to…

Q: Comparing a census of a large population to a sample drawn from it we expect that the

A: We know, Sample is usually a more practical method of obtaining the desired information.

Q: What is the difference between defining a research problem and developing a hypothesis?

A: The difference between defining a research problem and developing a hypothesis is given below:

Q: If a process in a factory is in a state of statistical control it means that it is unstable. True…

A: The given statement is "If a process in a factory is in a state of statistical control it means that…

Q: A colonoscopy is a screening test for colon cancer, recommended as a routine test for adults over…

A: Given values, p = 0.01n = 2602x = 12

Q: Discuss how the concept of statistical independence underlies statistical hypothesis testing in…

A: In order to test whether the two categorical variables are independent from each other or not, the…

Q: If a difference is not statistically significant, should you conclude that the two populations are…

A:

Q: A researcher has a hypothesis that a specific drug may have a higher prevalence of side effects…

A: The hypothesis is that a drug may have a higher prevalence of side effects among members of the…

Q: Starting with work life what is a description of scenarios where hypothesis testing may be…

A: Hypothesis testing:         Hypothesis testing was introduced by R.A.Fisher (Ronald Fisher).It is a…

Q: Explain predictive validity?

A: Predictive validity tells you how well future actions can be predicted by a certain measure.

Q: Is there evidence of an association between the duration of the pregnancy and the level of care…

A: Given:     Preterm (induced or cesarean Preterm (without procedures) Term  or post term Total…

Q: Describe the statistical pattern by which customers are generated over time must also be specified?

A: Queuing theory are used to measure the waiting, service level, service, waiting time, system etc.,…

Q: whats an experimental hypothesis?

A: Hypotheses is the plural form for hypothesis. Hypothesis is a statement about the population…

Q: whats a statistical hypothesis?

A: Hypothesis: Hypothesis is an assumption about the parameter of the population which will be made on…

Q: Define Estimation of Causal Effects?

A:

Q: Are relative risk of 2 and 0.5 the same or different in strength of association?

A: Relative Risk It is the proportion of occurred disease or mortality among the population group which…

Q: Does a high positive correlation between smoking and lung cancer and prove that one cause to…

A: Introduction: Correlation: Correlation is a measure of the strength of linear association between…

Q: In the "recipe for a test statistic" the variability that goes into the treatment effect comes from:…

A:

Q: One study of cell phones and the risk of brain cancer looked at a group of 469 people who have brain…

A: The study was done to know if the use of cell phones and the risk of brain cancer are associated…

Q: What is statistical inference

A: Note: Hi, thank you for the question. As per our company guideline we are supposed to answer only…

Q: True or False? Relative risk is an ideal form of measurement for a retrospective cohort study design…

A: Relative risk is the ration of risk of an event for the exposure group to the risk of an event with…

Q: What is the difference between practical significance and statistical significance? Give an example…

A: Meaning of statistically significant:In statistical analysis, the word “significance” essentially…

Q: A psychological study wants to analyze the relationship between anxiety and binge drinking; a…

A: Chi-square independence test: The chi-square is a non-parametric test which is used for comparing…

Q: When testing a new​ treatment, what is the difference between statistical significance and…

A: Statistical significance guarantees about the Existence of an effect, whereasPractical Significance…

Q: How to find the expected value and variance of a beta from a Gamma distribution?

A: Pdf of gamma distribution is

Q: A colonoscopy is a screening test for colon cancer, recommended as a routine test for adults over…

A:

Q: A colleague of yours has made a decision to decrease sample size because of limited funding.  What…

A: Probability value: P-value or probability value method involves the probability of getting a test…

Q: How to create a good research hypothesis?

A: *Answer :    There are several criteria that make a research hypothesis a good one, and following…

Q: Relative risk is an ideal form of measurement for a retrospective cohort study design because it…

A:

Q: Systematic variability in an experiment increases the risk of _______________

A: We have to find effect of systematic variability.

Q: What are two reasons null effects can happen? How can you increase the power of a statistical test…

A: Reasons of null effect

Q: What is the best thing to do when the result failed to meet statistical significance but had a…

A: Statistical significance of a result: It is used in the testing of hypotheses. To determine whether…

Q: True or False? In a study of cardiovascular risk factors, we might collect information on…

A: Whether or not they have diabetes, whether or not they smoke, and whether or not they are on…

Q: What does a rare outcome signifies?

A: A rare outcome signifies that, with respect to the null hypothesis, A rare test or means less…

Q: What is difference between type 1 and type 2 errors?

A:

Q: Explain the concept of Quasi-Experiments?

A:

Q: When do you consider a person to be statistically literate?

A: From the given information we find solution

Q: What is the expected value for an F-ratio when there is no treatment effect?   Why?

A: F-ratio: The F-ratio for ANOVA is given as follows: F=Variance between treatmentsVariance within…

Q: What does rare outcomes signifies?

A: A rare outcome signifies that, with respect to the null hypothesis, A rare test or means less…

Q: What conclusions can be drawn from a study with a “statistical significance” result?   What…

A: The result of a statistical test is said to be statistically significant, if the test statistic…

Q: The difference between an observed value and a predicted value of the response variable is called a…

A: Residual: The difference between the observed value of the response variable and actual value of the…

Q: 13. What is the Relative Risk for these data?

A: The given data set is, The formula for calculating the relative risk is,

Q: What is meant by saying that a statistical procedure is robust?

A: A statistical procedure is said to be robust in the following situations when the procedure is…