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

A random sample is selected from a normal population with a mean of µ = 30 and a standard deviation of s = 8. After a treatment is administered to the individuals in the sample, the sample mean is found to be µ = 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 a = .05.
b. 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 a = .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

★★★★★

3.34 Rating (154 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock

a With n 16 the standard error is 2 and z 32 ... View full answer

Question Has Been Solved by an Expert!

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

Step: 2 Unlock

Step: 3 Unlock

Document Format (1 attachment)

568-M-S-H-T (2896).docx

120 KBs Word File

Students Have Also Explored These Related Statistics Questions!

A random sample of size n1 = 16 is selected from a normal population with a mean of 75 and a standard deviation of 8. A second random sample of size n2 = 9 is taken from another normal population...

A simple random sample of 153 men results in a standard deviation of 11.3 beats per minute (based on Data Set 1 "Body Data" in Appendix B). The normal range of pulse rates of adults is typically...

A random sample is selected from a population with mean m = 100 and standard deviation s = 10. Determine the mean and standard deviation of the x sampling distribution for each of the following...

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 = 30 and a standard deviation of = 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 = 30 and a standard deviation of = 8. After a treatment is administered to the individuals in the sample, the sample mean is found...

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 found...

What is model building? How does it use secondary data? What are some examples of different applications of model building in marketing research?

Researchers record the yields of corn, in bushels per plot, for four different varieties of corn, A, B, C, and D. In a controlled greenhouse experiment, the researchers randomly assign each variety...

Determine whether the kiddie tax applies if EmmaEmma is age 2 1 . She also receives $ 9 comma 9 0 0 $ 9 , 9 0 0 of wages, which is greater than one - half of her total support.

After Irene Nusor fell behind on her mortgage payments, she answered an advertisement from Best Financial Consultants offering attractive refinancing opportunities. During a meeting at a McDonalds...

Belsky, Weinraub, Owen, and Kelly (2001) reported on the effects of preschool childcare on the development of young children. One result suggests that children who spend more time away from their...

McGee and Shevlin (2009) found that an individual's sense of humor had a significant effect on how attractive the individual was perceived to be by others. In a similar study, female college students...

Numerous studies have found that males report higher self-esteem than females, especially for adolescents (Kling, Hyde, Showers, & Buswell, 1999). A recent study found that males scored an average of...

Excel Online Structured Activity: Required Annuity Payments Assume that your father is now 50 years old, plans to retire in 10 years, and expects to live for 25 years after he retires - that is,...

Assignments are to be completed in MS Word using Calibri 12 font and referenced properly according to APA standards if required. Completed assignments are to be submitted via email to the course...

Journalize the following transactions assuming the perpetual inventory system and adjustments for tustemer refurds and estimated returns itwentory were insast at vesed end. The company uses the net...