tioning as people age (Bartus, 1990). However, the Researchers have noted a decline in cognitive func- results from other research suggest that the antioxi- dants in foods such as blueberries may reduce and dants in foods such as blueberries may reduce and even reverse these age-related declines (Joseph et al 1909), To examine this phenomenon, suppose that a researcher obtains a sample of n between the ages of 65 and 75. The researcher uses a standardized test to measure cognitive performanc for each individual. The participants then begin a 2-month program in which they receive daily doses of a blueberry supplement. At the end of the 2-mont period, the researcher again measures cognitive per- formance for each participant. The results show an average increase in performance of M, = 7.4 with SS = 1215. 16 adults who an D. a. Does this result support the conclusion that the antioxidant supplement has a significant effect on cognitive performance? Use a two-tailed test with a = .05. b. Construct a 95% confidence interval to estimate the average cognitive performance improvement

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results from other research suggest that the antioxi-
tioning as people age (Bartus, 1990). However, the
. Researchers have noted a decline in cognitive func-
dants in foods such as blueberries may reduce and
the
the .05 level of significance.
tioning as people age (Bartus, 1990). However, the
results from other research suggest that the antioxi-
even reverse these age-related declines (Joseph et al
1999), To examine this phenomenon, suppose that a
researcher obtains a sample of n = 16 adults who ar
between the ages of 65 and 75. The researcher uses
a standardized test to measure cognitive performanc
for each individual. The participants then begin a
2-month program in which they receive daily doses
of a blueberry supplement. At the end of the 2-mont
period, the researcher again measures cognitive per-
formance for each participant. The results show an
average increase in performance of M, = 7.4 with
SS = 1215.
%3D
%3D
D.
a. Does this result support the conclusion that the
antioxidant supplement has a significant effect on
cognitive performance? Use a two-tailed test with
a = .05.
b. Construct a 95% confidence interval to estimate
the average cognitive performance improvement
for the population of older adults.
f anaatad.measures
Transcribed Image Text:results from other research suggest that the antioxi- tioning as people age (Bartus, 1990). However, the . Researchers have noted a decline in cognitive func- dants in foods such as blueberries may reduce and the the .05 level of significance. tioning as people age (Bartus, 1990). However, the results from other research suggest that the antioxi- even reverse these age-related declines (Joseph et al 1999), To examine this phenomenon, suppose that a researcher obtains a sample of n = 16 adults who ar between the ages of 65 and 75. The researcher uses a standardized test to measure cognitive performanc for each individual. The participants then begin a 2-month program in which they receive daily doses of a blueberry supplement. At the end of the 2-mont period, the researcher again measures cognitive per- formance for each participant. The results show an average increase in performance of M, = 7.4 with SS = 1215. %3D %3D D. a. Does this result support the conclusion that the antioxidant supplement has a significant effect on cognitive performance? Use a two-tailed test with a = .05. b. Construct a 95% confidence interval to estimate the average cognitive performance improvement for the population of older adults. f anaatad.measures
Expert Solution
Step 1

Given data :

sample size, n =16

sample mean, x̄ = 7.4

sample standard deviation,s= √SS/(n-1) = √1215/(16-1) =  9

population mean,μ= 0

Significance level, α= 0.05

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