Question

a sample is randomly selected from a population with a
mean of u =50 and a treatment is administered to the individuals in
the sample after treatment the sample is found to have a M= 56 with
a standard deviation of s= 8 if there are n = 4 individuals in the
sample, are the data sufficient to reject Ho and conclude that the
treatment has a significant effect using a two-tailed test with a=
.05

(use/round to 3 decimal places)

A. t-critical= +-

B. t=

C. Do you accept or reject the null hypothesis based on these
results? type reject or accept

Answer #1

A sample is randomly selected from a population with a mean of μ
= 50, and a treatment is administered to the individuals in the
sample. After treatment, the sample is found to have a mean of M =
56 with a standard deviation of s = 8. If there are n = 4
individuals in the sample, are the data sufficient to reject Ho and
conclude that the treatment has a significant effect using a
two-tailed test with =...

A sample of n = 16 individuals is randomly selected
from a population with a mean of μ = 65, and a treatment
is administered to the individuals in the sample. After treatment,
the sample mean is found to be M = 73.
(a) If the sample standard deviation is s = 11, are the
data sufficient to conclude that the treatment has a significant
effect using a two-tailed test with α = 0.05? (Round your
answers to three decimal...

A random sample is selected from a normal population
with a mean of μ=50 and a standard deviation of σ=12. After a
treatment is administered to the individuals in the sample, the
sample mean is found to be M=55.
a. If the sample consists of n=16 scores, is the sample
mean sufficient to conclude that the treatment has a significant
effect? Use a two-tailed test with α =0.05. b. If the sample
consists of n=36 scores, is the sample mean...

A sample of n=18 individuals is selected from a population with
a mean of µ=77, and a treatment is administered to the individuals
in the sample. A treatment is administered to the individuals in
the sample and after treatment, the sample variance is found to be
s2=144.
a. If the treatment has a 3-point effect and produces a sample mean
of M=80, is this sufficient to conclude that there is a significant
treatment effect effect using a two-tailed test with...

A random
sample is selected from a normal population with a mean of µ = 30
and a standard deviation of σ= 8. After a treatment is administered
to the individuals in the sample, the sample mean is found to be x̅
=33.
Furthermore,
if the sample consists of n = 64 scores, is the sample
mean sufficient to conclude that the treatment has a significant
effect? Use a two-tailed test with α = .05.
4a. Which of
the following...

A
random sample is selected from a normal population with a mean of μ
= 20 and a standard deviation of σ =5 10. After a treatment is
administered to the individuals in the sample, the sample mean is
found to be M = 25. If the sample consists of n = 25 scores, is the
sample mean sufficient to conclude that the treatment has a
significant effect? Use a two-tailed test with alpha =
.05.

A sample is selected from a population with mean score of µ =
50. After a treatment is administered to the individuals in the
sample, the mean is found to be M = 55 and the variance is s2 =
64.
A. Assume that the sample has n = 4 scores. Conduct a hypothesis
test to evaluate the significance of the treatment effect and
calculate Cohen’s d to measure the size of the treatment effect.
Use a two-tailed test with...

A sample of n = 16 individuals is selected from a population
with µ = 30. After a treatment is administered to the individuals,
the sample mean is found to be M = 33. We do not know the
population standard deviation.
A. If the sample variance is
s2 = 16, then calculate the estimated standard
error and determine whether the sample is sufficient to conclude
that the treatment has a significant effect? Use a two-tailed test
with α =...

A sample of n = 16 individuals is selected from a population
with µ = 30. After a treatment is administered to the individuals,
the sample mean is found to be M = 33. We do not know the
population standard deviation.
A. If the sample variance is
s2 = 16, then calculate the estimated standard
error and determine whether the sample is sufficient to conclude
that the treatment has a significant effect? Use a two-tailed test
with α =...

A sample of n = 4 is selected from a population with µ = 50.
After a treatment is administered to the individuals in the sample,
the mean is found to be M = 55 and the variance is s2 = 64. Conduct
a one-sample t-test to evaluate the significance of the treatment
effect and calculate r2 to measure the size of the treatment
effect. Use a two-tailed test with α = .05. In your response, make
sure to state:...

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