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Heart failure is due to either natural occurrences (87%) or outside factors (13%). Outside factors are related to induced substances or foreign objects. Natural occurrences are caused by arterial blockage, disease, and infection. Suppose that 20 patients will visit an emergency room with heart failure. Assume that causes of heart failure between individuals are independent.
(a) What is the probability that three individuals have conditions caused by outside factors?(b) What is the probability that three or more individuals have conditions caused by outside factors?(c) What are the mean and standard deviation of the number of individuals with conditions caused by outside factors?
Temperature is used to measure the output of a production process. When the process is in control , the mean of the process is 128.5 and the standard deviation is 0.4
A medical researcher is interested in whether patient's left arms or right arms are longer. if 14 patients participate in this study (so that n left arms and n right arms are measured), how many degrees of freedom should the researcher use in her ..
Would Kruskal-Wallis be the suitable statistical procedure to test this Research Question (RQ)? Describe your answer. When would you use Chi-Square test rather than One-Way Anova?
The data given shows daily sales at the petrol station. Compute Karl Pearson's co -efficient of skewness. Quantity sold (in litres) and No. of days. are given.
The Appliance Center sells a variety of electronics equipments and home appliances. For last four years the following quarterly sales (in $ millions) were recorded.
Discuss which analysis of variance should be applied when an experiment has more than one independent variable. Discuss the assumptions and limitations of the analysis of variance in comparison with the t test including a discussion of post hoc te..
A group of young businesswomen wish to open a high fashion boutique in a vacant store, but only if the average income of households in the area is at least $25,00.A random sample of 9 households showed the following results:
Problems on Sampling Variability and Standard Error and Confidence Intervals
The data below are the numbers of hours of homework done as reported by 24 high school juniors for the last week in September 2006.
What is your conclusion? Are the two variables independent?
Suppose that X1,..,Xn form a random sample from the normal distribution with unknown mean M and unknown standard deviation S, and let m and s denote the MLEs of M and S. for the sample size n=17, find a value of k such that P(m > M +ks) = 0.95
A company adminsters an "aptitude test for managers" to aid in selecting new management trainees. Prior experience suggests that 60 percent of all applicants for management trainee positions would be successful if they were hired.
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