Question: Suppose a random sample of20students were given a diagnostic test before studying a particular module and then again after completing the module.Is there sufficient evidence

Suppose a random sample of20students were given a diagnostic test before studying a particular module and then again after completing the module.Is there sufficient evidence that the teaching method was effective (i.e. are their post-test scores higher on average than their pre-test scores)?

What is the pvalue and the results of the test?

Paired t-test data: post and pre t = 2.045, df = 19, p-value = 0.02748 alternative hypothesis: true difference in means is greater than 0 95 percent confidence interval: 0.5032675 Inf sample estimates: mean of the differences 3.258108

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!

Suppose a sample of students were given a diagnostic test before studying a particular module and then again after completing the module. We want to find out if, in general, if the teaching module...

The Tastee Bakery Company supplies a bakery product to many supermarkets in a metropolitan area. The company wishes to study the effect of the height of the shelf display employed by the supermarkets...

This study investigated the effectiveness of a popular batterers' intervention program in reducing repeated violence among men who were convicted of misdemeanor domestic violence. A classical...

On January 1, 2014, Iron Mountain Ski Corporation purchased a new snow-grooming machine for $50,000. The machine is estimated to have a 10-year life with a $2,000 salvage value. What journal entry...

Are there any downsides to live chats with bankruptcy courts? If so, what are they?

List two benefits and two costs of using (a) purchased liquidity management and (b) stored liquidity management to meet a deposit drain. LO.1

Each of two boxes contain 20 red balls and 30 black balls. We select a ball from the first box randomly and place it into the second one. Then, we select a ball from the second box and place it into...

Let's see whether quadratic voting can avoid the paradox of voting that arose in Table 5.3 when using 1p1v in a series of paired-choice majority votes. To reexamine this situation using quadratic...

3. Suppose a process that manufactures screws. One way to test each screw would be to test it with a calibrated thread. If the screw does not enter the thread, it is considered defective or...

Using the data provided, complete the template on the spreadsheet (Fill in all blue-shaded areas). Specifically, you need to: a.Forecast FCF for 2017 assuming that 2016 free cash flow grows at a...

recommendation for companies to utilize zoom app with its best quality

Audi cars are produced via a variety of approaches in China, India and Indonesia. Discuss each approach used in each country. You are also required to discuss the benefits and risks of the approaches...

You manage a development organization. A member of one of your Scrum Teams keeps being interrupted by the "Operations Group", due to his domain expertise on a legacy application that is critically...

Worksheet 4: Measuring Supply Chain Performance; Inventory Measures The cost of goods sold last year at ZIP Corporation was$3,069,000(i.e., annual sales, at cost). The company operates 48 weeks per...

You could easily now be asking yourself "How could the speed of the bar possibly be constant when there is a force pulling it to the right and the rails are frictionless?" That is a very legitimate...

use standard deviation. A new machine will cost $50,000. The machine is expected to last 10 years and have no salvage value. If the interest rate is 15%, determine the risk associated with the...

Express mass density in kg/m3 and weight density in lb/ft3. 1. Find the mass density of a chunk of rock of mass 215 g that displaces a volume of 75.0 cm3 of water. 2. A block of wood is 55.9 in. x...

=+a. Construct a time-series plot that shows how the average size of a home has changed over time.

=+from a study in which both a baseline gasoline and a reformulated gasoline were used. Consider the following observations on age (in years) and NOx emissions (in grams per kilowatt-hour):

=+e. Construct a cumulative relative frequency plot, and use it to answer the following questions.