Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
A study was conducted to investigate the effectiveness of a new anti-anxiety drug; the effects of the drug were tested on participants that either had low or high baseline levels of anxiety. The researchers hypothesized that the drug would be more effective at reducing anxiety in individuals with higher levels of baseline anxiety. The researcher tested a total of 48 participants, with 12 assigned to each of four experimental groups resulting from a factorial combination of the two independent variables. The effects of the drug were assessed using a well-validated self-report questionnaire, which measured anxiety on a 20-point scale with higher scores indicating greater levels of anxiety. 45 minutes before anxiety measures were taken, the participants in the study were administered either the anti-anxiety drug in pill form, or an identical placebo pill. Pills had different colors so that the experimenter could easily identify what they contained. Participants were informed in the consenting protocol that the study involved a new anti-anxiety drug, but were naïve regarding the aims of the study or the color coding of the pills. On debriefing, participants were approximately 50% correct when asked which experimental group they belonged to. To analyze the results the researcher used a two-factor ANOVA each with two levels: baseline anxiety (low vs. high); drug condition (placebo vs. anti-anxiety drug). The following table displays the mean anxiety scores post-drug for each condition.
Drug Condition
Baseline anxiety
Placebo
Anti-anxiety drug
Low
4
18
High
14
17
a. The main effect of drug was significant. Referring to the table of means, how would you describe verbally the effects of the drug?
b. The 'interaction effect' was also significant. Using the means in the table above write a statement describing how the anti-anxiety drug appears to affect anxiety. Are the results consistent with the hypothesis proposed by the researchers?
c. What aspects of the design help to control differences in demand characteristics between conditions, and what possible confound is still present? What method would be appropriate to rule out this above confound and how might it be implemented here?
A manager of a large department store with three floors reports that the time a customer on the second floor must wait for an elevator has a uniform distribution ranging from 0 to 16 minutes. It takes the elevator 1 minute to go from floor to floo..
Sampling distributions. Given a normal distribution with μ = 50 and standard deviation σ = 9, if a sample of n = 100 is selected.
What proportion of time will it take clean-up crew 56 or more hours for cleaning plant? Define the lower and upper limits of interval.
Here is a two-way table showing enrollment data for full-time undergraduate students in U.S. colleges and universities. The entries are thousands of students:
An experiment was carried out to assess the effects of four tomato varieties and four planting densities on yield. There were 64 plots, and each of the 16 factor combinations was randomly assigned to 4 plots. A partial ANOVA table
Employees of a local university have been classified according to gender and job type. The following table provides data about the employees.
Perform a proper analysis. Describe your null and alternative hypothesis, report the p-value. What is your conclusion?
Does the data prove a significant difference in mean times?
At 5% level of significance, does this sample prove violation of guideline that average patient must pay no more than $250 out-of-pocket? Write your hypotheses and decision rule.
The sample proportion of large gloves for each location is and . (Round your answers to 4 decimal places.)
Which of the following would have a binomial distribution and evaluate the binomial coefficient
Using the simple test of independence (described in the lecture), decide if the events high calorie and high fiber are independent or dependent. Show your work.
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd