# Statistics

: For each of the following samples that were given an experimental treatment, test whether these samples represent populations that are different from the general population: (a) a sample of 10 with a mean of 44, (b) a sample of 1 with a mean of 48. The general population of individuals has a mean of 40, a standard deviation of 6, and follows a normal curve. For each sample, carry out a Z test using the five steps hypothesis testing with a two-tailed test at the .05 significance level, and make a drawing of the distributions involved.

1. 👍 0
2. 👎 0
3. 👁 147
1. Z = (mean1 - mean2)/standard error (SE) of difference between means

SEdiff = √(SEmean1^2 + SEmean2^2)

SEm = SD/√(n-1)

If only one SD is provided, you can use just that to determine SEdiff.

Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportions related to the Z scores.

1. 👍 0
2. 👎 0

## Similar Questions

1. ### Statistics

The effectiveness of a headache medicine is tested by measuring the intensity of a headache in patients before and after drug treatment. The data consist of before and after intensities for each patient. Identify the design of the

asked by Samantha on November 21, 2013
2. ### Statistics - Help!!!

An independent measures research study compares three treatment conditions using a sample of n=5 in each treatment. For this study, the three samples have SS1=10, SS2=20, SS3= 15. What value would be obtained for MS within?

asked by Lizzy on May 2, 2014
3. ### statistics

Select the TWO options that are TRUE statements about two-sample t-tests. Select one or more: The same formula is used for the ESE (estimated standard error) in the two-sample t-test with a common variance and the two-sample

asked by mina on August 23, 2016
4. ### statistics

Can a student keep up their grade performance at the next level? Is a strong GPA at the Bachelors level a good predictor of a strong GPA at the Masters level, or are GPAs naturally going to decline since graduate school is

asked by rebecca on December 29, 2012
1. ### Psychology

can anyone help me with this. I can't think of anything or explain to me. Post an example of a simple experiment of your own creation by following this format: I would like to investigate the effects of _____________ on this

asked by Jeannie on February 7, 2011
2. ### Statistics

MBA_GPA BS GPA 2.82 3.05 3.49 3.45 3.28 3.5 3.25 3.55 3.26 3.3 2.87 3.05 3.16 3.35 3.4 3.35 2.84 3.05 3.72 3.7 3.22 3.5 3.44 3.55 3.65 3.9 3.02 3.3 3.03 3.25 3.8 3.8 3.23 3.5 3.26 3.5 3.53 3.75 3.75 3.9 3.15 3.2 3.66 3.75 3.36

asked by rebecca on December 29, 2012
3. ### Stats help

Which test should be used one samples t test, independent samples t test or dependent samples t test. What do you set the hypothesis as Five people who were convicted of speeding were ordered by the court to attend a workshop. A

asked by Anonymous on March 13, 2013
4. ### Biochemistry 1

1. You are given three fat samples and told that one of them contains cholesterol. State and clearly outline the test you would use to identify which of these samples contains cholesterol. Hint: Name of test, Procedure of test,

asked by Mangetty on April 20, 2011
1. ### psychology

how a t Test for a dependent variable can be of great value in applying a new approach to the treatment of aggressive behavior to a small group of students. Why would this t Test be preferred to using another test statistic?

asked by Anonymous on March 16, 2011
2. ### sampling distributions & parameter estimation

A "Friendliness Test" has a mean of 50 and a standard deviation of 9. Treat these values as parameters. A sample of 9 participants take the test. What is the expected mean? What is the standard error of the mean for samples of

asked by Jasmine on December 3, 2015
3. ### Biology

Medicinal uses of plants include all of the following except a. cancer treatment b. treatment for cardiac disorder c. decongestant d. Albanian treatment

asked by Safari on July 6, 2020
4. ### statistics

For each of the following samples that were given an experimental treatment, test whether these samples represent populations that are different from the general population: (a) a sample of 10 with a mean of 44, (b) a sample of 1

asked by val on June 19, 2011