72 and 74 years? e. What is the probability that the sample mean will be larger than 73.46 years? ANS: a. 0.0228 b. 0.0107 c. 0.7745 d. 0.1573 e. 0.9389 3. A simple random sample of 8 employees of a corporation provided the following information. Employee 1 2 3 4 5 6 7 8 Age 25 32 26 40 50 54 22 23 Gender M M M M F M M F a. Determine the point estimate for the average age of all employees. b. What is the point estimate for the standard deviation of the population
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Standard Operating Procedure for inline Q.A‚ using Statistical Process Control charts OBJECTIVE To remove or minimize‚ cost of poor quality. SCOPE This procedure is applicable for all kind of critical points for which variable charts are being made to know about the process stability. RESPONSIBILITY 1) Q.A. Manager Q.A. Manager is responsible for allotting the critical points in a particular product to in line Q.A.’s. 2) A.Q.M. A.Q.M. is responsible for carrying out
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method is a way for scientists and researchers to pursue and acquire knowledge. According to Wilson (1952) there are four steps in the scientific method: 1. Observe and describe the problem 2. Form a hypothesis to explain the problem 3. Use the hypothesis to determine if there are other problems that exist 4. Test the hypothesis The fourth step of the scientific method is where the experiments and tests take place. This is where the researcher and scientists must decide whether to
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applying theory to economic practice. After completing this module‚ students will be familiar with: the procedure of hypothesis testing; the possible outcomes in hypothesis testing; the difference between significant and nonsignificant statistical findings. After completing this module‚ students will be able to: define what is meant by a hypothesis and hypothesis testing; understand the logic of hypothesis testing and describe the steps of hypothesis testing procedure;
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the lower-control limit (LCL) is 2.94%‚ and the upper-control limit (UCL) is 10.15% given the 3-sigma p-chart showing the percent of pilots sick? (Hint: See note (1) for the sample size). Do not forget to plot the center line. b) What happens if you use 2-sigma control limits? Recalculate the control limits and discuss how your interpretation changes and why? c) Alternatively‚ what happens if you exclude the first two months? Recalculate the control limits and discuss whether your interpretation changes
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Gender Discrimination: A Statistical Analysis Gender discrimination‚ or sex discrimination‚ may be characterized as the unequal treatment of a person based solely on that person ’s sex. . It is apparent that gender discrimination is pervasive in the modern workplace‚ however‚ its presence and effects are often misrepresented and misunderstood. Statistical testing plays an important role in cases where the existence of discrimination is a disputed issue and has been used extensively to compare expected
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STATISTICAl ANALYSIS In the evolution of any scientific discipline there is a period in which attempts are made to develop mathematical theories in order to account for and explain the observations generated by the phenomena with which the discipline is concerned. During this period‚ the qualitative and verbal theories are replaced‚ or supplemented‚ by quantitative and mathematical theories which express‚ in the form of some type of equation or equations‚ a postulated mechanism or model that can
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A researcher predicts that watching a film on institutionalization will change students’ attitudes about chronically mentally ill patients. The researcher randomly selects a class of 36 students‚ shows them the film‚ and gives them a questionnaire about their attitudes. The mean score on the questionnaire for these 36 students is 70. The score for a similar class of students who did not see the film is 75. The standard deviation is 12. Using the five steps of hypothesis testing and the 5% significance
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Issues and constraints in relation to the use of business information Legal Issues Data Protection Act 1998 The first legal issue that Strode has to consider is the Data protection Act 1998. Strode College collects and uses data about its staff‚ students and other individuals who come into contact with Strode. Under the Data Protection Act the information must be collected and used fairly‚ stored safely and not disclosed to any other person unlawfully and the Data Protection Principles must be
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affect the use of information technology by students in Nigerian University libraries varies from availability of resources and materials‚ management and administration as well as students attitude and disposition. Laudon‚ (2002) explained that information technology is one of the many tools managers use to cope with changes‚ adding that computer which is at the core is the physical equipment used for imputing data and processing output. Similarly Haag (2002) asserted that information technology
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