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1. Jen will call Cathy on Saturday with a 60% probability. She will call Cathy on Sunday with an 80% probability. The probability that she will call on neither of the two days is 10%. What is the probability that she will call on Sunday if she calls on Saturday?
2. At a parking lot, there are 12 spaces arranged in a row. A man observed that there were eight cars parked and that the four empty spaces were adjacent to each other. Given that there are four empty spaces, is this arrangement surprising?
3. A fair die is rolled 12 times. Given that there are exactly two ones, what is the probability that there are exactly two sixes?
4. Jeff, Jen, and Cathy shoot at a bull's eye. They can hit the bull's eye 70%, 80%, and 75% of the time, respectively. One of the three is known to have hit the bull's eye. Find the probability that it was Jen.
the makers of a soft drink want to identify the average age of its consumers. a sample of 55 consumers was taken. the
Find the probability that (i) the student took mathematics or history; (ii) the student does not take either of these subjects.
1. find the margin of error for the given values of csand nc0.95s3.1n812. construct the confidence interval to find the
A survey found that women's heights are normally distributed with mean 63.6 in and standard devistion 2.5 in. a branch of the military requires women's heights to be between 58 in and 80 in. What is the percentage of women who meet the height requ..
I want to estimate within $10 the mean salary of all graduates who were business majors in college. How many business majors would be needed to estimate the mean salary to within 10 with 95% confidence if the population standard deviation is $200.
find the probability density function for a normal random variable with a mean of 15 and a standard deviation of
You are given an annual time series with 40 consecutive values and asked to fit a fifth-order autoregressive model.
You are given the sample mean and the sample deviation, Use this information to construct the 90% and 95% confidence intervals for the population mean. Which interval is wider?
the national association of realtors estimates that 23 of all homes purchased in 2004 were considered investment
In a poll of 1,004 adults, 93% indicated that restaurants and bars should refuse service to patrons who have had too much to drink. Construct the 90% confidence interval for the proportion of all adults who feel the identical way.
acme supply sells cooking supplies to restaurants via six wholesale outlets in the metro area. the company wants to
What is the estimated index of satisfaction for a person who first married at 18, has an annual income of $26,500, has three children living, has assets of $156,000.
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