Consider the following results for two samples randomly taken from two populations. (a) Determine the degrees of freedom

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Consider the following results for two samples randomly taken
from two populations.
(a)
Determine the degrees of freedom for
the t-distribution. (Round your answer down to the
nearest integer.)
(b)
Develop a 95% confidence interval for the difference between the
two population means. (Use Sample A − Sample B. Round
your answer to three decimal places.)
____ to ____
(c)
Is there conclusive evidence that one population has a larger
mean? Explain.
(a) Because the range of the interval is from negative to
positive, it indicates that there is conclusive evidence (at 95%
confidence) that Sample A has a larger mean than Sample
(b) Because the range of the interval is from positive to
positive, it indicates that there is no conclusive evidence (at 95%
confidence) that Sample A has a larger mean than Sample
B.
(c) Because the range of the interval is from positive to
positive, it indicates that there is conclusive evidence (at 95%
confidence) that Sample A has a larger mean than Sample B.
(d) Because
the range of the interval is from negative to positive, it
indicates that there is no conclusive evidence (at 95% confidence)
that Sample A has a larger mean than Sample B.