Significant effect on memory

Reference no: EM1389631

Some researchers claim that herbal supplements such as ginseng or ginkgo biloba enhance human memory. To test this claim, a researcher selects a sample of n = 25 college students. Each student is given a ginkgo biloba supplement daily for six weeks and then all the participants are given a standardized memory test. For the population, scores on the test are normally distributed with μ = 70 and σ = 15. The sample of n = 25 students had a mean score of M = 75.

a. Are the data sufficient to that the herb has a significant effect on memory? Use a two-tailed test with α = .05.

b. Compute Cohen's d for this study.

Reference no: EM1389631

Questions Cloud

Mean selling price in the goodyear : A recent article in the Arizone Republic indicated that the mean sellingprice of the homes in the area is more than $220,000. Can we conclude that the mean selling price in the Goodyear, AZ area is more than $220,000.

Prepare an input-output design plan for the new sbruts : Prepare an input/output design plan for the new SBRUTS information system. Include examples of input/output screens, forms, and reports as part of your design.

Describe the elements necessary for a prima facie case : Describe the elements necessary for a prima facie case of age discrimination. Create a list of points the employer can use in rebuttal.

Concentration of potassium ions : The single channel current for a sodium channel is 6.4 pA, how many ions flow through the channel in 0.5 msec? Faraday constant = 96500 coulombs each mol.

Significant effect on memory : Are the data sufficient to that the herb has a significant effect on memory? Use a two-tailed test with α = .05.

Iia protein of the phosphotransferase system : Think about a strain of E. coli that contain a mutation in the gene encoding the IIA protein of the phosphotransferase system.The transport of glucose is not affected by this mutation;

Determine the best possible way to account for inflation : Determine the best possible way to account for inflation when considering where to invest your money

Probability that the two bus meet each other : Alice and Bob agree to meet at the bus stop between 12 noon and 1pm. They each arrive at a random time in that interval and wait for 5 minutes before leaving, unless they see the other person. What is the probability that they meet each other?

Assess your current financial situation to determine : Assess your current financial situation to determine which concept(s) discussed in would be the most important for you to take into account before you made a $10,000 investment in debt securities

User Account

All Pages