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A student club has 40 members including Stacy and Tom.
(a) In how many ways can the club elect different individuals to serve as president, vice-president, secretary and treasurer?
(b) In how many ways can the club select four of its members to organize an upcoming movie night?
(c) What is the probability that Stacy and Tom are elected as president and vice-president (not necessarily in that order)?
(d) What is the probability Stacy and Tom are selected for the movie night committee?
The manufacturer would like to establish inventory levels such that there is only a 2.5 percent chance of running out of stock. Where should the manufacturer set the inventory levels?
A survey of 85 families showed that 36 owned at least one DVD player. Find the 99% confidence interval estimate of the true proportion of families who own at least on DVD player.
a first is accustomed to training operators who do certain tasks on a production line. those operators who attend the
If, 20 patients improved, 7 declined, and 3 remained the same, assess whether or not patients undergoing this treatment are showing significant change from baseline to 3 months afterward. Report a p-value.
q1. a market researcher wants to test to determine if families of four in city a spend less per week on average than
Perform a significance test to assess whether there is an association between mortality from cirrhosis of the liver and duration of employment in the group hired after 1945. Report a p-value.
A GSS asked. "What do you think is the ideal number of children for a family to have? the 497 female who responded had a median of 2, mean of 3.02 and standard deviation of 1.81 (a) Report the point estimate of the population mean.
A soft drink company has recently received customer complaints about its one-liter-sized soft drink products. Customers have been claiming that the one-liter-sized products contain less than one liter of soft drink.
What are the advantages of ANOVA over the mean test and what are the disadvantages? Where would I use this in my everyday life?
Test the claim that the proportion of students in this district who use computers in school is at least 80%. State the correct hypotheses.
A multiple-choice examination consists of 90 questions, each having possible choices a, b, c, d, and e. Approximate the probability that a student will get at least 21 answers correct if she randomly guesses at each answer.
Standard deviation of 1.4 inches. What is the probability that the average length of a steel from a sample of 36 is more than 27.65inches long?
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