department during a three-month period‚ determine the values of the mean and median. The number of days absent is reported to the nearest half-day. Employee Number ID of days absent 001 5.0 002 0.0 003 1.5 004 3.0 005 1.0 006 2.0 007 9.0 008 5.5 009 1.0 010 4.0 011 2.0 012 2.0 3. Comment upon and interpret the differences in the values of the mean and median computed in Question 2. Which of these values best represents the “typical”
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Venous Ulcer A venous ulcer is a shallow sore on your lower leg caused by poor circulation of the veins. This condition used to be called a stasis ulcer. Veins have valves that help blood return to the heart. If these valves do not work properly‚ blood flows backward and backs up into the veins near the skin. This causes the blood to pool in your lower legs. The blood can then can leak out of your veins and irritate your skin. This may cause a break in your skin and lead to stasis venous ulcer. A
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Exam 1 Chapter 1 * In statistics the group we wish to study is called the population * A sample is a subset of the population which is used to gain insight about the population. Samples are used to represent a larger group‚ the population. * • Descriptive statistics – the collection‚ organization‚ analysis‚ and presentation of data. * Inferential statistics – uses descriptive statistics to estimate population parameters; an educated guess about the population based on sample
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2. Find a 95% confidence interval for the proportion of all acceptable students with a combined score less than the median(356) who choose Harrigan’s rival over Harrigan. Do the same for those with a combined score greater than the median. “less than median” = 26/75 = 0.3467 = sample mean 95% confidence interval = 0.3467 ± 1.96*0.5/(75)^0.5 = 23.35%~45.98% “greater than median” = 48/75 = 0.64 = sample mean 95% confidence interval = 0.64 ± 1.96*0.5/(75)^0.5 = 52.68%~75.32% 4. a) 95% confidence
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through narrow arteries and enters the capillaries‚ which are the narrowest blood vessels. Many substances and some blood cells pass into and out of the blood by moving through the thin porous capillary walls. The blood is then carried through the veins‚ which return the blood to the heart. The passage of blood through the ves- ’" sels in a part of the body is called perfusion of that part. Some materials that are carried away from a region of the body do not pass into the blood but are collected
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Nonparametric Tests Basic Concepts • Sampling Distribution • Central Limit Theorem • Parametric Tests • Non Parametric Tests • When to use Nonparametric Tests? • Important Non Parametric Tests and their Parametric Alternatives • Advantages and Disadvantages of Nonparametric Tests. Useful Tests • Test of Normality. • Chi Squared Tests • One-Sample Runs Test • Wilcoxon Signed-Rank Test • Mann-Whitney Test • Kruskal-Wallis Test • Spearman Rank Correlation Test Sampling
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range = 20 mode = 73 variance = 324 median = 74 The coefficient of variation equals a. 0.30% b. 30% c. 5.4% d. 54% Answer: b 6. The variance of a sample of 169 observations equals 576. The standard deviation of the sample equals a. 13 b. 24 c. 576 d. 28‚461 Answer: b 7. The median of a sample will always equal the a. mode b. mean c. 50th percentile d. all of the above answers are correct Answer: c 8. The median is a measure of a. relative dispersion
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Statistical Concepts Series Radiology Seema S. Sonnad‚ PhD Describing Data: Statistical and Graphical Methods1 An important step in any analysis is to describe the data by using descriptive and graphic methods. The author provides an approach to the most commonly used numeric and graphic methods for describing data. Methods are presented for summarizing data numerically‚ including presentation of data in tables and calculation of statistics for central tendency‚ variability‚ and distribution
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Statistic Report for UNITE AUTOMOBILE ENTERPRISE Lecturer:- Dr Haslindar Ibrahim Prepared by:- Zalifah Che Embee (DL1010195) Habibah Kadir (DL1013072) Zahari Sehak (DL1016065) Mohd Aswad Abd Karim (DL1018773) Shahrul Asmadi Shahmarudin(DL1010501) Introduction Unite Automobile Enterprise was established in January 2009. The company is involved in selling various types of domestic and import cars. Unite Automobile Enterprise sales have been particularly slow this past year. Unite
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a nurse who has had specialty training or a doctor. Both of these people must use a machine called an ultrasound to find the veins in the upper arm. Just like any other line‚ the vein‚ when found‚ must be cleaned and covered with a sterile cloth so that infection can be prevented. Before the administration of the PICC line‚ the area where they are going to access the vein at is
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