This was a level III one-group quasi-experimental design that studied if low-level laser therapy improved the healing of diabetic foot ulcers. The sample used was seven type-II diabetes with grade 2 or 3 foot ulcers. The data collected was measurements of the ulcer surface area‚ ulcer height‚ duration‚ and A1C. The Braden Scale was used to determine the ulcer risk of the participants. The data was
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CHAPTER 3 METHODS AND PROCEDURE In this chapter the researchers includes the following: Research method used‚ Sample and sampling techniques‚ Research instruments and techniques‚ and Statistical treatment of Data. Research Method Used In conducting the research‚ the researchers used Descriptive Method‚ which tries to find answers on questions related to existing condition. Descriptive research involves collecting data‚ which answers the questions
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estimated is the a. level of significance 5. To compute the minimum sample size for an interval estimate of μ‚ we must first determine all of the following except d. degrees of freedom 6. The use of the normal probability distribution as an approximation of the sampling distribution of [pic] is based on the condition that both np and n(1 – p) equal or exceed b. 5 7. The sample size that guarantees all estimates of proportions will meet the margin of error requirements
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DESIGNS………………………………… P. 6 5. Topic 2: PROBABILITY.…………………………………………………….………………………… P. 10 6. Topic 3: GENERAL PRINCIPLES OF HYPOTHESIS TESTING……….………………………… P. 22 7. Topic 4: STATISTICAL HYPOTHESIS TESTING: SINGLE SAMPLE GROUPS DESIGN.…… P. 29 8. Topic 5: STATISTICAL HYPOTHESIS TESTING: TWO SAMPLE GROUPS DESIGN………… P. 31 9. Topic 6: STATISTICAL HYPOTHESIS TESTING: CORRELATION DESIGNS………….……… P. 33 10. APPENDIX A: List of formula….……………………………………………………………………… P. 34 2 PYC3704-- 2011 Dear UNISA
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15-1 A representative sample is one in which the characteristics of interest for the sample are approximately the same as for the population (that is‚ the sample accurately represents the total population). If the population contains significant misstatements‚ but the sample is practically free of misstatements‚ the sample is nonrepresentative‚ which is likely to result in an improper audit decision. The auditor can never know for sure whether he or she has a representative sample because the entire
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process Beetroot samples: The same size beetroots will be used throughout the experiment this is to ensure that the impact of the temperature on every sample will stay the same‚ i.e. if having a bigger beetroot sample less pigments will be released into the test tube at lower temperature‚ or having a smaller beetroot sample more pigment will be released into the test tube. This error will change the results of the experiment at large. Therefore it is important to insure the sample sizes are the same
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Lizard Lab Hypothesis: If the Inselberg Lizard and the Desert Iguana can mate and reproduce a fertile offspring then they are the same species. Materials: - 51 male Inselberg Lizards - 51 female Inselberg Lizards - 51 male Desert Iguanas - 51 female Desert Iguanas - Four suitable contained habitat - More than 2-year worth of food for the Desert Iguana and the Inselburg lizard Procedures: 1. Put the male Inselberg Lizards into one of the four suitable
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According to the data‚ the population size obtained for Group RG/CL is an outlier in respect to other groups’ population sizes. After two weeks of sampling and counting the population of mealworms‚ a population of 506 mealworms was calculated. A very broad confidence interval was also calculated‚ ranging from 143.58 to 868.42 (Table 1). Although other groups seem to have large confidence intervals‚ they are within a 200-300 limit. The confidence interval calculated for Group RG/CL has about a 700
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since the size of the initial population was so low. Seeing that there is a relatively strong correlation between job performance and cognitive ability we could assume that there is probable validity in the cognitive ability as a predictor of job performance. This evidence will help the organization decide whether or not to incorporate the use of cognitive ability into the selection process for future job applicants. Since both the original population size and the second population size were significantly
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• Use the normal distribution to interpret z scores and compute probabilities • Estimate a population mean or proportion using a point estimate and confidence intervals and interpret the confidence level • Determine the appropriate sample size for a specific margin of error and confidence interval • Conduct and interpret hypothesis tests for both means and proportions • Perform chi-square analysis and make relevant conclusions • Determine appropriate statistical techniques
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