Question
In: Math
A sample of n = 9 individuals is selected from a population with µ = 50....
A sample of n = 9 individuals is selected from a population with µ = 50. After a treatment is administered to the individuals, the sample mean is found to be M = 54. The sums of squares is SS =72. The researchers want to address whether the obtained sample mean is different from the population mean at α = .05, two-tailed.
a. Following the steps of a hypothesis test, determine whether the obtained sample mean is different from the population mean.
b. Calculate Cohen’s d and r2.
c. Write a sentence demonstrating how the results of the hypothesis test and the measure of effect size (use either d or r2) would appear in a research report.
Solutions
milcah answered 1 year agoRelated Solutions
A sample of n = 16 individuals is selected from a population with µ = 30....
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. A. Assume that the sample
variance is s2 = 16. Compute a single sample t-test to evaluate if
the treatment produced a significant effect and calculate r2 to
measure the size of the treatment effect. Use a two-tailed test
with α = .05. B. Now, assume...
A sample of n = 16 individuals is selected from a population with µ = 30....
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. A. Assume that the sample
variance is s2 = 16. Compute a single sample t-test to evaluate if
the treatment produced a significant effect and calculate r2 to
measure the size of the treatment effect. Use a two-tailed test
with α = .05. B. Now, assume...
A sample of n = 16 individuals is selected from a population with µ = 30....
A sample of n = 16 individuals is selected from a population
with µ = 30. After a treatment is administered to the individuals,
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A sample of n = 4 is selected from a population with µ = 50.
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the mean is found to be M = 55 and the variance is s2= 64.
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using a two-tailed test with alpha = .05? Be sure to show all
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A sample is selected from a population with µ= 50. After a treatment is administered to...
A sample 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.
For a sample of n = 16 scores, conduct a single sample
t-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 α = .05. Show the
sampling distribution....
A sample of students is selected from a population with µ = 50. After a treatment...
A sample of students 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.
If the sample has n = 16 scores, then conduct a
hypothesis test to evaluate the significance of the treatment
effect.
Use a two-tailed test with α = .05.
What is the est. standard error or est. s.e.
value?
What...
A sample is selected from a population with µ= 50. After a treatment is administered to...
A sample 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.
a. For a
sample of n = 4 scores, conduct a single sample t-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 α = .05.Show the
sampling distribution.(2pts)...
A sample is selected from a population with µ= 50. After a treatment is administered to...
A sample 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.
a. For a
sample of n = 4 scores, conduct a single sample t-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 α =...
A sample of n = 16 scores is obtained from a population with µ = 50...
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z = - 2.00
z = +0.50
z = +2.00
z = +8.00
A researcher selects a random score from a normally distributed
population. What is the probability that the score will be greater
than z = +1.5 and less than z =...
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