Effects on mean mark and time taken

Reference no: EM1317716

A study was conducted to assess whether red bull enhanced the exam performance of first year under-graduate students; the effects of red bull were tested on students that were exposed to either a multiple choice exam or an unseen essay. The researchers tested a total of 80 participants, with 20 assigned to each of four experimental groups resulting from a factorial combination of the two independent variables. The effects of red bull were assessed on two dependent measures; mean mark obtained in each one of the four experimental conditions and time taken to complete each type of examination in minutes. To analyze the results, for each dependent measure the researcher used a two-factor ANOVA each with two levels: type of exam (multiple choices vs. unseen exam); drug condition (placebo vs. red bull).

Table: Mean mark

Drug Condition
Type of Exam	Placebo	Red bull
Multiple Choice	75	85
Unseen essay	30	98

Table: Time taken in minutes to complete examination

Drug Condition
Type of Exam	Placebo	Red bull
Multiple Choice	30	28
Unseen essay	50	55

a. Type of examination produced significant main effects on both mean mark and time taken to complete the examination. Referring to the table of means, how would you describe verbally the effects of type of examination on the two dependent measures used in this study?

b. Did red bull produce significant main effects on both mean mark and time taken to complete the examination? Use the table above of means to support your answer?

c. The 'interaction effect' for the dependent variable mean mark was significant. Using the table of means, write a statement describing how Red bull appears to affect the mean mark received in the unseen examination.

d. Another researcher wishing to replicate these results considered using a repeated measures design for the type of examination factor, to reduce the number of participants that had to be recruited. Briefly explain what a repeated-measures design is and how would it be implemented here. What further advantage would this provide here?

Reference no: EM1317716

Questions Cloud

Graphing the given function using graphing utility : Graphing the given function using the graphing utility - Compare with the exact solution w(t) = 2ln(1 + t) + 3.

Multiplication on the 12 hour clock : Multiplication on the 12 hour clock

Marketplace police unethical business behavior : Should the law impose ethical requirements on small businesses or privately held companies or can the marketplace police unethical business behavior? Provide support to justify your position.

Price of petroleum used in producing tires causes market : The short run price elasticity of demand for tires is 0.9. If an increase in the price of petroleum used in producing tires causes the marketplace.

Effects on mean mark and time taken : Kind of examination produced significant main effects on both mean mark and time taken to complete the examination.

Find the dimensions of a rectangle : Determining the dimensions of a rectangle of maximum area that is formed by x- axis and a semi circle - What length and width should the rectangle have so that its area is a maximum?

Create a cumulative percentage distribution : Form the cumulative percentage distribution and plan a cumulative percentage polygon.

Stocks of socially responsible or ethical : There are mutual funds that invest in stocks of socially responsible or ethical or green companies. Do a Google search to identify at least three such funds and look up their performance.

Confidence interval estimate of the population mean examin : Illustrate what is the 95% confidence interval estimate of the population mean examination score if a sample of 200 applications provided a sample mean of Xbar=935

User Account

All Pages