Question: 6. A random sample is selected from a normal population with a mean of u=30 and a standard deviation of o=8. After a treatment is

6. A random sample is selected from a normal population with a mean of u=30 and a standard deviation of o=8. After a treatment is administered to the individuals in the sample, the sample mean is found to be M=33.

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 ox=.05.

b. If the sample consists of n=64 scores, is the sample mean sufficient to conclude that the treatment has a significant effect? Us a two tailed text with ox= .05.

c. Comparing your answers for parts a and b. explain how the size of the sample influences the outcome of a hypothesis test.

Step by Step Solution

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock blur-text-image

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Students Have Also Explored These Related Mathematics Questions!

1. A sample has a mean of M=100, and standard deviation of S=10. Find the z score for each of the following X values from this sample. A. X=90 B. X=60 C. X=120 D. X=105 E. X=40 2. A random sample of...

1) In a study researchers found that the sample had aM=60, s 2 =25 and n=36. Given the population has a =60, what is the t value obtained from this study? 2) Given that =8.0. What is t obt if the...

1. 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...

Identify the four steps of a hypothesis test as presented in the chapter. 2-The psychology department is gradually changing its curriculum by increasing the number of online course offerings. To...

Please use the following information to answer 4a-4e: A random sample is selected from a normal population with a mean of= 30 and a standard deviation of= 8. After a treatment is administered to the...

Please use the following information to answer 3a-3e: A random sample is selected from a normal population with a mean of= 30 and a standard deviation of= 8. After a treatment is administered to the...

A random sample is selected from a normal population with a mean of u=100 and a standard deviation of o-15. After a treatment is administered to the individuals in the sample, the sample mean is...

A random sample is selected from a normal population with a mean of = 30 and a standard deviation of s = 8. After a treatment is administered to the individuals in the sample, the sample mean is...

A random sample is selected from a normal population with a mean of = 50 and a standard deviation of = 12. After a treatment is administered to the individuals in the sample, the sample mean is...

A random sample is selected from a normal population with a mean of = 30 and a standard deviation of = 8. After a treatment is administered to the individuals in the sample, the sample mean is...

To what degree are you influenced by best case scenario ads? Do you feel immune to them?

A 1st order high-pass filter is dimensioned so that the buckling frequency is 2000 rad/s. R = 42 Perform a simulation in Simulink that shows the output signal Y when the input signal X is a square...

8. Inflation and Exchange Rates (LO3) Suppose the current exchange rate for the Polish zloty is PLN3.03. The expected exchange rate in three years is PLN 3.06. What is the difference in the annual...

Chill Pill Pharmaceuticals is expecting a growth rate of 14% for the next two years due to its new drug. Thereafter it should level to an 8% growth rate. The last dividend paid was $0.65 per share....