Free

Drill - Essay Example

Comments (0) Cite this document
Summary
What are the differences between a two sample t-test and ANOVA hypothesis testing? When would you use ANOVA at your place of employment, in your education, or in politics? Please give an example for one of these contexts-describing your independent…
Download full paperFile format: .doc, available for editing
GRAB THE BEST PAPER95.9% of users find it useful
Drill
Read TextPreview

Extract of sample "Drill"

Drill Questions: Statistics Part In ANOVA, what does F mean? What are the differences between a two sample t-test and ANOVA hypothesis testing? When would you use ANOVA at your place of employment, in your education, or in politics? Please give an example for one of these contexts--describing your independent and dependent variables.
When an ANOVA yields a statistic value of 1, it means that the variance of the true scores is equal to the variance of error in measurement. While a two sample t-test attempts to verify if the difference seen in the means of two groups is significant, the ANOVA attempts to understand if the variance estimates of the two groups are significantly different. Thus, the ANOVA helps in understanding if two groups with similar mean scores also share estimates of variance or whether the groups are genuinely different in the way the scores vary within the group.
The ANOVA can be used to verify the differences among groups’ performance in different settings. For example, it could be used to verify which of different mnemonic devices are useful for a particular subject. In order to do so, it is possible to choose two or three mnemonic devices and ask different groups of students to use one device each while studying for a mock test. A control group could be asked to study without using any mnemonic devices to serve as a control group. After the test, the scores for each group may be collected, and by using the ANOVA it would be possible to see if the groups’ variance is similar or different from that of the others. For this study, the type of mnemonic device used would be the independent variable and the scores (performance) on the mock test would be the dependent variable.
Part 2
A researcher compares mens and womens attitudes toward "road rage." Specifically, college students are asked to read a brief scenario describing a road rage incident in which a driver of a car attempts to scare a bicycle rider who accidentally cut across his path. The driver aims his car at the bicyclist and the bicycle rider, in an attempt to get out of the way, falls and gets hurt. Men and women rate how much they are disturbed by the drivers reaction using a 10-point scale (1 = not disturbed at all, 10 = very disturbed). The mean for men was 7.4 and the mean rating for women was 8.6. A t-test for independent groups indicated the following result: t (28) = 2.76, p = .01. Answer the following questions about the results of this hypothetical experiment.
1. Were the results statistically significant?
Yes, the results of the t-test conducted were statistically significant; showing that women’s ratings of how disturbed they were by the driver’s reaction was significantly higher than that of men.
2. How many men and women were there in this study (assuming equal numbers in each condition)?
The sample for this study consisted of 30 individuals (d.f. +2 = n). thus, assuming equal numbers, the sample has 15 men and 15 women.
3. What does the p value tell you in addition to the fact that the results may be considered statistically significant?
The p value shows that the chances of the observed difference between the ratings of men and women’s scores occurring by chance and thus, of it being not representative of the population is 1 in a 100. This means that the chance of the observed difference being a genuine reflection of the population condition is 99 out of 100.
4. Is a Type II error possible in this study?
No, Type II error is not possible in this study. A Type II error is when the null hypothesis is accepted even though is actually false. In this study, the null hypothesis has been rejected as the difference between the two groups was found to be significant.
5. What should the researcher report along with the results of the t-test?
The researcher should report the confidence intervals for the results and the effect size of the t-statistic. This will help in understanding the strength of the observed difference.
References
Howitt, D. &  Cramer, D. (2008). Introduction to statistics in psychology. (4th Ed.) New York: Pearson. Read More
Cite this document
  • APA
  • MLA
  • CHICAGO
(“Drill Essay Example | Topics and Well Written Essays - 250 words”, n.d.)
Drill Essay Example | Topics and Well Written Essays - 250 words. Retrieved from https://studentshare.org/psychology/1597941-drill
(Drill Essay Example | Topics and Well Written Essays - 250 Words)
Drill Essay Example | Topics and Well Written Essays - 250 Words. https://studentshare.org/psychology/1597941-drill.
“Drill Essay Example | Topics and Well Written Essays - 250 Words”, n.d. https://studentshare.org/psychology/1597941-drill.
  • Cited: 0 times
Comments (0)
Click to create a comment or rate a document

CHECK THESE SAMPLES OF Drill

Power hand drill

...?Design College Introduction A power hand drill is an electric device, which uses drill bits to enlarge existing holes in a material or create holes in them. These materials rang from wood, plastic to even metal. The hand drill can also grind, buff, and brush wires when with other accessories. Hand drills are available in many types, shapes, and sizes that can accommodate accessories with shaft diameters of different lengths and drills bits of different sizes. Hand drills have a number of uses from the house, shop, and workshop and even at factories depending on their sizes. The grouping or classification of hand drills...
15 Pages(3750 words)Essay

Application of Enginerring Principles

...a) Mud cleaners are used to remove particles of drilled solids that are suspended in the barite and fluid suspension. Usually a combination of centrifugal force by hydrocyclones, and vibratory screens are used in combination. Linear motion mud cleaners have linear motion vibrating screens. A schematic of a mud cleaner is shown in Figure 1. Figure 1. Mud Cleaner As seen from the figure, the fluid with the suspended drilled solid particles that need to be removed is fed through the inlet. It passes through a rotating hydrocyclone. Hydrocyclone is cylindrical on the upper side and conical in the lower side. Due to centrifugal force, clean mud overflows, and the waste particles (together with some amount of...
12 Pages(3000 words)Coursework

Reasons to Drill Off Shore

...? Environmental studies: Reasons to drill off shore Jaime Thurber  Van Derwalker  English 102  June 29, Reasons to drill off shore 1973 -1975 oil price hike has shocked the world economy. The growth rate fell to 2.1% in 1974 and to 1.45 in 1975. The worldwide trade growth rate also dropped heavily from 12% in 1973 to -5.4% in 1974 and -7.3 in 1975. Foreign Direct Investment (FDI) has dropped from 40% in 1973 to half of it in 1974 (Oil prices and global economy, 2006, p.4) Oil prices and global economy have direct relationships. In other words, global economy is inversely proportional to oil prices. When oil price increases, global economy declines and when the oil price decreases global economy achieves...
6 Pages(1500 words)Essay

Developing an Auger (Earth Drill) one stage Gearbox System. A comparing study between two planetary gears systems, spur and h

...require output bearings of 6407 while input bearings of 6009. On the other hand the helical gearbox design would require output bearings of 7309 BE while input bearings of 7209 BE. The gearing materials were found out best to be AISI 304 while the casing ought to be created from cast iron. Cost comparison shows that spur gearbox is much cheaper especially because of the lower cost of the ring spur gear in comparison to the ring helical gear. Therefore the spur gearbox design was chosen as the optimal configuration for the current problem at hand. Summary In order to determine the best possible solution for a gearbox for an auger earth drill an extensive investigation was carried out. The investigation was begun with a...
56 Pages(14000 words)Dissertation

Dynamic of percussive enginnering

...Dynamics of Percussive Engineering Abstract The earth is comprised of numerous mineral deposits that are yet in the process of discovery (Gunter, M.E., 2008). These investigations recognize the particular place where the mineral deposits will be recognized and then drilling process is made to extract & then finally refine the mineral. First it is vital to recognize where the mineral deposits will be worked out. For this, an ecological study of the area should be accompanied to recognize if mineral deposits occur in that room and also whether it can be completed effortlessly, swiftly and inexpensively. Mineral is present in a specific region. A region where diamond is present might not be the places for oil & gas which...
37 Pages(9250 words)Dissertation

Mathematics.Games for drill and practice

...and simple and also less as compared to the instructions given for the first activity as the understanding of the children increase. For example the teacher can display the video of the game and then allow them to take drills of the activity according to the comfort of the students like practicing it during breaks or after school. The third activity is the fractions: The game comprises of three parts as described under: 1. Area Model: In this the students divide shapes into the appropriate number of equal sections given by the denominator, then shade in the appropriate number of sections, given by the numerator to create a picture of the fraction. Further, equivalent fractions are also developed using this area model....
4 Pages(1000 words)Essay

Volly 2

...Volleyball drills for defence and offence Volleyball is a game which needs strong defence and offence in order to win matches. Any weak links in the team, either in the defence or offence will be exploited by the opposite team. There are lot of drill available for strengthening defence and offence equally well. This paper briefly explains two kinds of drills which can strengthen the defence and the offence. Touch ten drill for strengthening defence Touch ten drill is one of the most common drill given to the defenders of a volleyball team by their coach. This drill teaches aggressiveness on defence. Normally all the...
2 Pages(500 words)Essay

How to prevent Military Drill Sergeants from making the unethical decision to Fraternize with Trainees

... It is commonly heard that military drill sergeants mistreat trainees. This has been reported occasionally in some military training camps. There are some reasons that are attached to this that make it to never end. Despite this, some policies have been put forth to mitigate this. It is a kind of inhuman behavior where the drill sergeants want to treat the trainees as slaves. This can be controlled by incorporating more relevant measures. How to Prevent Military Drill Sergeants from making the Unethical Decision to Fraternize with Trainees Overview of the Problem Military drill sergeants are taken as an excellence symbol in the first stages of the military training. A drill sergeant who is an expert in the warrior duties... and the in the...
5 Pages(1250 words)Research Paper

Read: From Bibles to Drill Bits

...From Bibles to Drill Bits Question The European Nations felt that the settlement in the Middle East after the war fuelled endemic conflict as opposed to bringing harmony and stability within the locality. The American government did not show any form of interest in Arabia because they believed that the region had minimal commercial importance since no significant development was evident. Question 2 King Ibn Saud regarded the American missionaries as captivated evangelists. One thing that he was most interested in was obtaining effective medical care. Question 3 Increased industrialization and manufacture of automobiles prompted the US to look elsewhere for overseas reservoirs due to increased demand for petroleum....
1 Pages(250 words)Assignment

Should we drill for offshore oil

...Should We Drill for Offshore oil al Affiliation) Oil is the world’s most important fuel as it provides modern convenienceand it is crucial for transport systems. It occurs from fossil; naturally decaying plants and animals. These remains of prehistoric algae and plankton, whose remains settled on the bottom of the sea or ocean were combined with mud and eventually decayed. Overtime it got heated at high temperatures created by layers of sediments changing the chemical compositions into a waxy compound called Kerogen. It was later turned into a liquid through a process called Catagenesis when the temperature increased. After its formation, it travels from the source rock onto the surface where it is trapped in impermeable...
5 Pages(1250 words)Research Paper
sponsored ads
We use cookies to create the best experience for you. Keep on browsing if you are OK with that, or find out how to manage cookies.

Let us find you another Essay on topic Drill for FREE!

Contact Us