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A group of businessmen consist of p(d)=40 % Democrats and p(d')= 60% Republicans. If p(s/d)=30 % of the Democrats smoke cigars, and p(s/d')=50% of Republicans smoke cigars also. What is the probability that a cigar- smoking businessmen is a Republican?
Find the mean, median, mode, variance, standard deviation, frequency table, cumulative frequency table, coefficient of variation, and mean deviation of the population.
Suppose you wish to test a one-tail hypothesis where you reject H0 only in the lower tail. You calculate ZSTAT = 1.38. What is the statistical decision if you test the null hypothesis at the 0.01 level of significance?
What is the difference between the critical-value method and the p-value method of hypothesis testing? Include in your post how the question's topic pertains to your health discipline.
A certain brand of Green Energy light bulbs was advertised as having an average illumination life-span of 2,500 hours. A random sample of 50 bulbs burned out with a mean life-span of 2,470 hours and a sample standard deviation of 140 hours.
A study of postoperative pain relief is conducted to determine if drug A has a significantly longer duration of pain relief than drug B.
Describe a research problem that would benefit from Factor Analysis. What are the variables and what would you hope to achieve?
As a part of the feasibility study, they wish to estimate the mean weekly child-care cost of their employees. A sample of 10 employees who use child care reveals the following amounts spent last week.
Test whether there is significant difference in the test anxiety level of the three groups using nonparametric test.
Suppose that a certain college class contains 54 students. Of these, 34 are sophomores, 35 are psychology majors, and 7 are neither. A student is selected at random from the class.
A grab bag contains 10 $1 prizes, 7 $5 prizes, and 3 $20 prizes. three are chosen at random. find the probability that exactly two $20 prizes are chosen?
Administrators at a university are planning to offer a summer seminar. It costs $3000 to reserve a room, hire an instructor, and bring in the equipment. Assume it costs $25 per student for the administrators to provide the course materials.
Find out the best predicted household size given that the household discards 5.00 lb of plastic.
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