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 u = 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 a = .05 to evaluate the effect of the supplements.
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 u = 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 a = .05 to evaluate the effect of the supplements.
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
Related questions
Question
![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 u = 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
a = .05 to evaluate the effect of the
supplements.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F766a36a5-2366-44c5-9912-4436f61c6e1b%2Fe45ca749-9e6f-4eee-9f45-dcbc3c636b99%2Fmnzumii.jpeg&w=3840&q=75)
Transcribed Image Text: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 u = 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
a = .05 to evaluate the effect of the
supplements.
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