A random sample of n 36 scores is selected from a normal population with a mean of 60 After a treatment is administered to the individuals in the sample, the sample mean is found to be M 52 a If the population standard deviation is 18, is the sample mean sufficient to conclude that the treatment has a significant effect Use a two tailed test with 05 b If the population standard deviation is 30, is the sample mean sufficient to conclude that the treatment has a significant effect Use a two tailed test with 05 c Comparing your answers for parts a and b, explain how the magnitude of the standard deviation influences the outcome of a hypothesis test

Question: A random sample of n = 36 scores is selected from a normal population with a mean of = 60. After a treatment is

A random sample of n = 36 scores is selected from a normal population with a mean of µ = 60. After a treatment is administered to the individuals in the sample, the sample mean is found to be M = 52.

a. If the population standard deviation is σ = 18, is the sample mean sufficient to conclude that the treatment has a significant effect? Use a two-tailed test with α = .05.

b. If the population standard deviation is σ = 30, is the sample mean sufficient to conclude that the treatment has a significant effect? Use a two-tailed test with α = .05.

c. Comparing your answers for parts a and b, explain how the magnitude of the standard deviation influences the outcome of a hypothesis test.

Step by Step Solution

★★★★★

3.48 Rating (164 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock

a With 18 the standard error is 3 and z ... 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)

1475-M-S-P(11374).docx

120 KBs Word File

Students Have Also Explored These Related Statistics Questions!

The following scores are the ages for a random sample of n = 30 drivers who were issued speeding tickets in New York during 2008. Determine the best interval width and place the scores in a grouped...

Miller (2008) examined the energy drink consumption of college undergraduates and found that males use energy drinks significantly more often than females. To further investigate this phenomenon,...

A random sample of n = 25 scores is obtained from a population with a mean of = 45. A treatment is administered to the individuals in the sample and, after treatment, the sample mean is M = 48. a....

10. A random sample of n 36 scores is selected from a normal population with a mean of 60. After a treatment is administered to the individuals in the sample, the sample mean is found to be M 52. a....

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...

.][Check below attachments carefully PSYCH 018 Homework #1 10 points Answer the following questions to help you focus on important concepts in these chapters. Write in complete, grammatically-correct...

A random sample of n = 25 scores is selected from a normal population with a mean of = 40. After a treatment is administered to the individuals in the sample, the sample mean is found to be M = 44....

A random sample of n = 25 scores is selected from a normal population with a mean of = 40. After a treatment is administered to the individuals in the sample, the sample mean is found to be = 44....

14. A random sample of n = 9 scores is selected from a normal population with a mean of p = 100. After a treatment is administered to the individuals in the sample, the sample mean is found to be M =...

A random sample of n = 49 scores is selected from a normal population with a mean of = 80. After a treatment is administered to the individuals in the sample the sample mean is found to be M = 75. If...

Estimate with 95% confidence the mean job tenure (CUREMPYR).

The Common Stock account for Baltimore Corporation on January 1, 2020 was $60,000. On July 1, 2020 Baltimore issued an additional 5,000 shares of common stock. The Common Stock is $5 par. There was...

zandi sole proprietorship's pre - adjustment trial balance shows rent expens of R 6 0 0 0 utilities, expense of R 1 5 0 0 0 and salaries of R 8 0 0 0 . After adjusting entries are made the net income...

Explain important properties of point estimators, including bias, variance, and mean square error

For a sample with a standard deviation of s 5 12, describe the location of each of the following z-scores in terms of its position relative to the mean. For example, z 5 11.00 is a location that is...

For a population with a standard deviation of s 5 20, find the z-score for each of the following locations in the distribution. a. Above the mean by 5 points b. Above the mean by 2 points c. Below...

Under what circumstances would a score that is 15 points above the mean be considered an extreme score? a. When the mean is much larger than 15 b. When the standard deviation is much larger than 15...

What does the highest point in the frequency polygon show? A- it shows where most of the participants are clustered B- it shows where the least of the participants are clustered C-it shows where the...

open this Microsoft Word document. Using your knowledge of effective writing and the tips on page 147 for evaluating the work of other writers, evaluate this message. After you set Microsoft Word to...

Assessed Exercises Sheet 1 Al.1. Use the substitution x = a sinh u to work out the integral (a? + 12)1/2 dec. [4] A1.2. (i) Show that the Laplace transform of f(x) = x is 2. (ii) Show by induction...