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1. You are interested in studying the relationship between cigarette-smoking habits in married couples. Suppose that the probability of the wife being a smoker is 0.4 whereas the probability of the husband being a smoker is 0.5. Also, suppose that if the husband is a smoker, then the probability that the wife is a smoker is 0.6; whereas if the husband is not a smoker, then the probability that the wife is a smoker is 0.2. Use these data to answer the questions below.
a. What is the probability that the husband and the wife smoke?
b. What is the probability that the husband smokes and the wife does not smoke?
To test Upper H0?: µ=100 versus Upper H1?:µ ?n?100, a simple random sample size of n=21 is obtained from a population that is known to be normally distributed.
Find the critical F-value to test the hypothesis that there is no difference among the means. Use α = .05, Find the test F statistic to test the hypothesis that there is no difference among the means. Use α = 0.05.
Known population of 1000 students to construct a 95% confidence interval for teh average SAT score. What correction factor should be used to compute the standard error?
Assume they select randomly. What is the probability that all 4 winners will select the same type of tree?
A product goes through 20 independent operations. For each operation, the first-pass yield is 95%. What is the rolled throughput yield for the process?
You have scanned an integer literal into a character buffer (perhaps yytext). You now want to convert the string representation of the literal into numeric (int) form. However, the string may represent a value too large to be represented in int fo..
Drug testing of job applicants - In 1990, 5.8% of job applicants who were tested for drugs failed the test. At the 0.01 significance level, test the claim that the failure rate is now lower if a simple random sample of 1520 current job applicants ..
In standard normal distribution standard deviation is always ___.
senior management of a consulting services firm is concerned about a growing decline in the firms weekly number of
(a) What proportion of customers enter the system? (b) What proportion of entering customers receive service from B? (c) What is the average number of customers in the system? (d) What is the average amount of time that an enterin..
Good golfers. In 2007, Tiger Woods won $10,867,052 on the Professional Golfers Association tour. The leading money winner in 1940 was Ben Hogan, at $10,655.
the number of calories and number of grams of sugar per serving were measured for 36 breakfast cereals. the data are in
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