We test for a hypothesized difference between two population means .pdf

•

0 likes•2 views

We test for a hypothesized difference between two population means: H0: ?1 = ?2. The population standard deviations are unknown but assumed equal. The number of observations in the first sample is 15, and 12 in the second sample. How many degrees of freedom are associated with the critical value? 24 25 26 27 Solution df = n1 + n2 - 2 = 15 + 12 - 2 = 25.

Education

More from anandtradingco

What are different criminal sanction philosophy\'s? Please define them. Solution the main objective of criminal sanction is the criminal should change his behaviour, nature and should be live a comfortable and paceful life like ohters. there are many criminal santions, i will define few of them: 1. capital punishment: in this the accuse should be house arrested, send him for imprisonment, house arrest and so on. the level of punishement is depends on the level of seriousness and offences against him. 2. Nonconsequentialism; in this the punishment will be in this way that the advantage will be taken back. means if some one stolen your goods and once they found they will be returned to you. it is called as seperation..

What are different criminal sanction philosophys Please define th.pdf

anandtradingco

What are cooperative strategies? Solution cooperative strategies speaks about how the firms or individuals support, interact, integrate and cooperate with each other to accomplish a given task. here they can share the information, the resources, and the assets to attain the goal. some times the firms comes together and share the sources, its name is joint ventures. sometimes they take a step forward with the name of forward integration and some times they choose backward integration. it simply focus on how firms integrate their limited resources to get maximum benefit for all..

What are cooperative strategiesSolutioncooperative strategies.pdf

anandtradingco

What are 3 engineering applications of the coefficient of permeability of soils (what phase of construction, purpose of them and the importance they hold to geotechnical engineers) Solution The permeability of soils is a very important feature which plays the crucial role in issues connected with the flow of ground water and the migration of pollutions. The occurrence of subsoil water in a building-site often complicates realization of works and requires an additional intervention with the use of special equipment. The ability of water conduction in a soil is the essential factor in the consolidation process because it decides about the intensivity of this phenomenon. The realization of structural constructions is, almost in every case, directly or indirectly connected with the flow of subsoil water. Thus the problem of water flow in soils has been the subject of scientific research for many years. Factors Affecting Permeability of Soil Studying soil permeability is important because of the following reasons: 1. Underground seepage study is an important aspect of all the Civil Engineering works because once a foundation is laid, you don\'t want the soil mass holding your foundation to leak water. 2. It aids in the determination of geostatic stresses and the effect of water pressure on earth structures. 3. It gives a beforehand idea about settlement of a foundation and volumetric changes in soil layers when subjected to fluids or water. 4. Before constructing a structure, it is always helpful to know the amount of water that can be discharged through a soil mass, and calculating permeability is the best way to know the discharge quantity. There are numerous factors that affect the permeability of a soil mass. Important factors are mentioned below: 1. Chemical components of the interacting fluid, if not water, and its temperature. 2. Porosity of the soil mass under consideration, soil compaction also impacts permeability of soil. 3. Permeability from particle size of soil grain size, particle shape, and degree of packing of soil mass constituents. Cohesive soils deserve particular attention with regard to their low permeability. For a long time, these soils have been used to build cores of earth dams and constructions protecting hydro- engineering structures against harmful results of seepage. Natural or remould structure layers of cohesive soils are a good isolating material to be built-in. Therefore, they can successfully fulfil the role of seepage barriers protecting the environment against the expansion of pollution.

What are 3 engineering applications of the coefficient of permeabili.pdf

anandtradingco

What am I doing wrong? MINI PROJECT 5 Step 1: Think of a specific objective you have at work or school that involves other people. Once you have thought of an objective, jot it down. You will refer to this objective throughout the analysis. Step 2: Use the following spreadsheet to list five to fifteen people at your school or in your professional network with whom you have regular contact and who are relevant to the objective you identified. Step 3: Rate how tightly connected you are with the people in your network using the given scale (barely connected, loosely connected, somewhat connected, or tightly connected) on the left- hand side of their name. Step 4: For each person, put a check mark in the box if they know each other where their two numbers intersect on the right hand side of their name. For example, if person 1 knows person 2, put a check mark under the 2 on the top of the page. Continue to do this throughout the grid. Record for each person whether he or she knows someone else on the list: put a check mark in the box which shows the intersection of their names. For example, if person 1 knows person 2, put a check mark in the horizontal row for person two in the box in the vertical row for person 2. Step 5: Circle the name of persons who have introduced you to four or more new people since you have known them. Step 6: Analyze your network using the guidelines on the following calculations. Step 7: In what ways could you strengthen your network? Barely Connected Loosely Connected Somewhat Connected Tightly Connected Name 2 3 4 5 6 7 8 9 10 11 12 13 14 15 X 1 Nicole X X X X X X X 2 Jen X X X X X X 3 Barb X X X X X X 4 Brittney X X X X X X 5 Marissa X X X X X X 6 Becky X X X X X X 7 Dan X X X X X 8 9 10 11 12 13 14 15 Let Barely Connected Loosely Connected Somewhat Connected Tightly Connected Name 2 3 4 5 6 7 8 9 10 11 12 13 14 15 X 1 Nicole X X X X X X X 2 Jen X X X X X X 3 Barb X X X X X X 4 Brittney X X X X X X 5 Marissa X X X X X X 6 Becky X X X X X X 7 Dan X X X X X 8 9 10 11 12 13 14 15 Solution One thing you missed out was circling the person who introduced you to more than 4 people. The mistake you have done is you have made duplicate entries in the spreadsheet. For instance, you have marked that 2 knows 3. Also you have marked that 3 knows two. it turned out to be a duplicate entry resulting in a sum of 42. if you remove those duplicate \"x\". Then the total sum would be 21. So, C/M= D would give 21/21=1.

What am I doing wrongMINI PROJECT 5Step 1 Think of a specific .pdf

anandtradingco

What advantage does the Poisson distribution have over the binomial? (In other words, why would one ever use the Poisson distribution? Please do not use computational quickness as an answer.) Solution What advantage does the Poisson distribution have over the binomial? (In other words, why would one ever use the Poisson distribution poisson we will use only when probablity is small and no of things are more. for other things bionomial suits best.

What advantage does the Poisson distribution have over the binomial.pdf

anandtradingco

What accounts for the geographic dispersion of the Federal Reserve district banks? Shouldn Solution For the purpose of carrying out these day-to-day operations of the Federal Reserve System, the nation has been divided into twelve Federal Reserve Districts, with Banks in Boston, New York, Philadelphia, Cleveland, Richmond, Atlanta, Chicago, St. Louis, Minneapolis, Kansas City, Dallas, and San Francisco. Twenty-five Branches of these Banks serve particular areas within each District.

What accounts for the geographic dispersion of the Federal Reserve d.pdf

anandtradingco

Wertz Construction Company decided at the beginning of 2014 to change from the completed- contract method to the percentage-of-completion method for financial reporting purposes. The company will continue to use the completed-contract method for tax purposes. For years prior to 2014, pretax income under the two methods was as follows: percentage-of-completion $120,000, and completed-contract $80,000. The tax rate is 35%. Prepare Wertz’s 2014 journal entry to record the change in accounting principle. Solution.

Wertz Construction Company decided at the beginning of 2014 to chang.pdf

anandtradingco

Week 7 Quality Control and Inventory Management - Quiz.pdf

anandtradingco

Webb Company owns 90% of Jones Company. The original balances presented for Jones and Webb as of January 1, 2011, are as follows: Jones sells 20,000 shares of previously unissued shares of its common stock to outside parties for $10 per share. What is the new percent ownership of Webb in Jones after the stock issuance? Please provide detailed calculation. A. 75%. B. 90%. C. 80%. D. 64%. E. 60%. A. 75%. Solution.

Webb Company owns 90 of Jones Company. The original balances presen.pdf

anandtradingco

Web applications and the mobile Web are not the only exciting developments in the use of networks. For many people “multimedia” is important, because it involves technical challenges in providing voice over IP and video-on-demand to every computer, and also because of the immense profits of it. What are some of the technical means we use to implement streaming audio and video? i digital audio is a digital representation of an audio wave that can be used to recreate it; audio waves can be converted to digital form by an Analog-to-Digital Converter (ADC) ii the data rate of sending audio over the Internet can be reduced by an order of magnitude if compression is used; one of the most popular audio compression algorithms is MPEG audio layer 3 (MP3) – it transforms the signal mathematical by a Fourier transform into its frequency components iii if a sequence of images is drawn at 50 images/second the eye does not notice they are discreet images; with video systems we exploit this principle; we represent the images in digital form by using a grid of pixels (picture elements) i ii i and ii i and iii Solution Ans: C) i and iii Explanation: digital audio is a digital representation of an audio wave that can be used to recreate it; audio waves can be converted to digital form by an Analog-to-Digital Converter (ADC) and if a sequence of images is drawn at 50 images/second the eye does not notice they are discreet images; with video systems we exploit this principle; we represent the images in digital form by using a grid of pixels (picture elements) we use to implement streaming audio and video.

Web applications and the mobile Web are not the only exciting develo.pdf

anandtradingco

We often describe or assess exposures across different types of geopolitical groups. For example, we might talk about exposure to air pollution across different zip codes, or water quality across different census blocks, or pesticide exposures across different counties. Why do we do this? Are there any limitations to doing this? Solution We can elaborate the limitations of geo-political groups by considering the aid given to neighbouring or developing countries :- .1.The aid given to a developing country can have negative impact on the local communities as aid agencies make certain decisions without considering the social,cultural and environmental needs of the developing or neighbouring country 2.A large amount of the aid money could potentially be spent elsewhere can be used to better the country\'s own economy . Let us now elaborate geo-political groups and their importance. Nowadays Resource Wars, Identity Conflicts, Disinformation, Geostrategic Rivalries, Global Power Shift and increasing number of non-state actors,etc. are rampant and are a common phenomenon and they make it difficult to analyse contemporary international relations.Hence to deal with this problem, the geopolitical approach can be a useful tool, as it takes into account the strategic, historical, geographical, cultural and economic spheres in simplifying the complexity of current and potential future conflicts..

We often describe or assess exposures across different types of geop.pdf

anandtradingco

We use a number of contemporary technologies to enhance services tha.pdf

anandtradingco

We select random samples from several racial categories (Caucasian, .pdf

anandtradingco

We recruited study candidates from the Greater Boston area using n.pdf

anandtradingco

We have discussed Regression Models and talked about causal models. Briefly, identify what each is and how they may be related in a particular quantitative study. Hint: How are they different? Solution Cause and effect is not demonstrated with regression, it only shows that the variables differ together. One variable could be affecting another or the affects could be coming from the way the data is defined..

We have discussed Regression Models and talked about causal models. .pdf

anandtradingco

We are testing the hypothesis that frequent users of Facebook will have a significantly different level of self-esteem than infrequent users of Facebook. We calculated a T-Test for these two groups: Frequent users of Facebook- separate mean Infrequent users of Facebook. Solution the formula for F ratio= variance of 1st sample/variance of 2nd sample. (1) Male- Frequent/Infrequent-separate means = 50/18= 2.778 (2) Female- Frequent/Infrequent- separate means =165.33/67= 2.468.

We are testing the hypothesis that frequent users of Facebook will h.pdf

anandtradingco

We have two seperate groups of 5 students who volunteered to run through an obstacle course. Below are their times in seconds. We hypothesize that the variance in the times for Group 1 is GREATER than for Group 2. At alpha=.10, is there enough evidence to support this hypothesis? USE P-VALUE METHOD. Group 1 ----- Anders ----- Bertha ----- Callo ----- Duff ----- Embry Time 15 20 10 15 8 Group 2 ----- Isolde ------ Jette ----- Kelsie ----- Lourdes ----- Malloy Time 8 19 13 7 10 Solution The test hypothesis is Ho: o1^2=o2^2 Ha: o1^2>o2^2 The test statistic is F=s1^2/s2^2 =4.722288^2/4.827007^2 =0.96 The p-value = P(F>0.96)=0.5153 (from F table) Since the p-value is larger than 0.1, we do not reject Ho. So we cannot conclude that there enough evidence to support this hypothesis.

We have two seperate groups of 5 students who volunteered to run thr.pdf

anandtradingco

We are finishing up two types of inferential statistics at this point, estimating population parameters with interval estimates (Chapter 6) and making decisions about populations using hypothesis testing (chapter 7). MY QUESTION IS... What is the most confusing about these inferential statistics is Solution the most confusing about these inferential statistics is which distribution should use where and weather it should be one sode test or two sided test.

We are finishing up two types of inferential statistics at this poin.pdf

anandtradingco

More from anandtradingco (18)