Akademik Yazım - RESEARCH METHODS IN SOCIAL SCIENCES

MBA- RESEARCH METHODS IN SOCIAL SCIENCES - (below is also contained in the doc file attached. 1. Please answer following questions in the spaces allocated to each: What do researchers rely on when selecting a sample? What are the theoretical supports provided to them by Statisticians / Mathematicians? What does the“Cental Limit Theorem” got to do with it? Important reminder::Please leave aside practical reasons like ease, cheapness, simplicity, time-saving and any other considerations of this nature; because we do not want to get into these common-sensical arguments. These are all valid and correct considerations but we do not want to discuss them here in a theoretical context. 2. Write the probabilities satisfying following inequalities.  P(-1.2> z or z>1.98)=  P(z<1.59)=  P( )=0.15 Please write three different intervals satisfying the probability (% 15)  P(z<-0.9)=  P(z<1.96)=  P(z<0.13 ve z>0.13)=  P(z<0.13 veya z>0.13)=  P(z>0.18)=  P(-1<z<1.48)=  Write the “z” value which leaves p=0.25 on the upper tail of the normal distribution. z=…………  Write the “z” value which leaves p=0.025 on the lower tail of the normal distribution. z=………… 3. Classify the variables described in the table below as “”continuous” and “discontinuous” and give the levels of measurement for each description. (Mark the relevant boxes and write the level of measurement) DESCRIPTION OF THE VARIABLE CONTINUOUS DISCONTINUOUS LEVEL OF MEASUREMENT Numbers on sportsmans uniforms Number of teachers in schools Grades given in the form of letters (Like A,B,.. D,…and F) Box office revenues of a theater house Number of persons in a family Temperature in Fahrenheit degrees Measurement of an area (in meter squares) Street names in numbers (Like 1742. Street) Examination results as percentage of correct answers Utility of a commodity (attention)) Weights of athletes Percentage of votes given to a political party Calender years in INKA calender Gender qualification (girl, boy) Five-scale-measurement (Likert scale) Earthquake measured in Richter scale 4. Fill in the “t” values in the table below at the given levels of “degrees of freedom”. (Degrees of freedom) Probability on the single tail 0.05 0.025 0.01 0.001 df=8 df=14 df=25 df=150 5 Following mean and variance is calculated from the random sample collected from the population of midterm exam: , while the sample size is (n=28) . Calculate fort he mean value of the student population:: a. Confidence intervals of % 90, % 95 ve % 99 levels. b. What must be the level of confidence if the total length of the interval (that is, 2 units on each side) is 4 units? c. If we want to keep the length of the interval at 4 points and the level of confidence at % 99, What the size of the sample should be satisfy these conditions? 6. The penetration rates of Brand “A” in two different geographical regions of the country is estimated to be a1 and a2 respectively. Field research employed in Region 1 sampled n1=512 and n2= 486 sales points. Write the null and alternative hypotheses to be tested and verify whether or not a statistically significant difference exist between these two regions for the penetration rate of Brand “A” 7. Graduate students have gotten the following average grades with respect to their age and profession groups. Please test whether or not age groups differ with respect to their grades obtained (One-way-analysis of variance). Write the null and the alternative hypotheses and report your conclusion) Health and Medicine Education Management and Adm. Engineering Social sciences Other Less than 25 71 68 53 86 77 72 26-30 80 73 67 76 55 74 31-35 77 66 71 81 49 79 36 or over 88 79 75 86 82 67