What is true about outliers? Choose 2 answers.

Outliers detected in a study are useful in determining if something does not belong in the study.

Outliers that are miskeyed can be corrected prior to analysis.

All outliers are statistically significant when using a normal distribution.

All observed outliers should be eliminated from a study prior to analysis.

A patient satisfaction survey was conducted at Family Practice A. The average rating of online telemedicine visits was 4.5 out of 5, while in-person visits received a 3.0 out of 5. Which samples should be used to compare the ratings?

Online Family Practice A telemedicine visits and in-person Family Practice A visits

Total Family Practice A visits and online telemedicine visits

Total Family Practice A visits and in-person visits

Online ratings of other family practices and online ratings for all Family Practice A visits

Which use of statistics would apply to employees?

Predicting future levels of financial risk

Influencing future vendor prices

Predicting future levels of financial risk

Determining financial interest rates

Collaborating with competitors on wholesale pricing

VPC2 C207 Data-Driven Decision Making Version 3

00:00 Elapsed

Q 1 / 56 00:00

Question 1

When researchers are studying the effect of new drug treatments on patients, bias can be introduced by patients if they are aware of who receives the placebo. Which type of research design eliminates this type of bias?

Your Answer: Option(s)

Correct Answer: Option(s) B

Rationale

Blind study eliminates bias introduced by patient awareness of treatment assignment.

In a blind study, participants are unaware of whether they are receiving the treatment or a placebo, which helps to minimize bias in their responses and behavior. This design is crucial for ensuring that the outcomes of the study are a result of the treatment itself rather than the patients' expectations.

A) Time series study
A time series study examines data points collected or recorded at specific time intervals, focusing on trends over time rather than the effects of a treatment in a controlled environment. This design does not address bias related to participant awareness since it lacks the randomization and blinding necessary to mitigate the influence of patient expectations.

C) Observational study
An observational study involves monitoring participants without manipulating any variables, meaning researchers observe outcomes based on natural behaviors. However, since patients are fully aware of their treatment status, this design does not effectively eliminate bias arising from patients' knowledge of whether they are receiving a placebo or an active treatment.

D) Prospective cohort study
A prospective cohort study follows a group of individuals over time to assess outcomes based on exposure to certain factors. While this study design can yield valuable insights, it does not inherently include blinding, which means patients may still know if they are receiving a placebo, thus allowing for potential bias in their responses and behaviors.

Conclusion
Blind studies are essential in clinical research as they effectively eliminate bias associated with patient awareness of treatment allocation. By keeping participants unaware of whether they are receiving the treatment or a placebo, researchers can ensure that the study results reflect the true efficacy of the intervention rather than the influence of patients' expectations. Other study designs, such as time series, observational, and prospective cohort studies, do not provide this level of bias control, making blind studies a critical component in the integrity of clinical trials.

Select an answer to continue →

0% score

0/0 correct

Answered 0/56

Correct 0

Wrong 0

56 left

Unlock Full Access

All questions, explanations & stats

Subscribe Now

Blind study eliminates bias introduced by patient awareness of treatment assignment.

Outliers detected in a study are useful in determining if something does not belong in the study.

Online Family Practice A telemedicine visits and in-person Family Practice A visits.

Quantitative research is the type of experimental design being implemented by the laboratory.

Predicting future levels of financial risk applies to employees.

Free Preview Ended

Unlock Full Access

Blind study eliminates bias introduced by patient awareness of treatment assignment.

Outliers detected in a study are useful in determining if something does not belong in the study.

Online Family Practice A telemedicine visits and in-person Family Practice A visits.

Quantitative research is the type of experimental design being implemented by the laboratory.

Predicting future levels of financial risk applies to employees.

Free Preview Ended

Unlock Full Access

You are leaving this quiz

You're in the middle of a quiz

Report an Issue

Rate this Practice Test