sample of n = 16 scores is selected from a n
Contingency Table
A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.
Binomial Distribution
Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.
sample of n = 16 scores is selected from a normal population with u = 60 and o = 20. a. What is the probability that the sample mean will be greater than 50? Proportion=___________________.
b. What is the probability that the sample mean will be less than 56? Proportion=___________________.
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
a. Use a two-tailed test with a = .05. Conduct the four steps for hypothesis testing and label each step: Step1, Step 2, Step 3, and Step 4.
b. Calculate Cohen’s d.
c. Are the data sufficient to conclude that there is a significant difference? Write your
answer in the form of a sentence.
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