Mathematics, 13.03.2020 17:04 maliyahsanmiguel
Although there is a popular belief that herbal remedies such as Ginkgo biloba and Ginseng may improve learning and memory in healthy adults, these effects are usually not supported by well-controlled research (Persson, Bringlov, Nilsson, and Nyberg, 2004). In a typical study, a researcher obtains a sample of n = 16 participants and has each person take the herbal supplements every day for 90 days. At the end of the 90 days, each person takes a standardized memory test. For the general population, scores from the test form a normal distribution with a mean of ? = 50 and a standard deviation of o = 12 . The sample of research participants had an average of M = 54 .
a) Assuming a two-tailed test, state the null hypothesis in a sentence that includes the two variables being examined.
b) Using the standard 4-step procedure, conduct a two-tailed hypothesis test with \alpha = .05 to evaluate the effect of the supplements.
Answers: 2
Mathematics, 21.06.2019 22:00, kiiya33
Select the correct answer from each drop-down menu. consider the following polynomials equations. 3x^2(x-1) and -3x^3+ 4x^2-2x+1 perform each operation and determine if the result is a polynomial. is the result of a + b a polynomial? yes or no is the result of a - b a polynomial? yes or no is the result of a · b a polynomial? yes or no
Answers: 1
Although there is a popular belief that herbal remedies such as Ginkgo biloba and Ginseng may improv...
Computers and Technology, 24.02.2020 19:02
World Languages, 24.02.2020 19:02