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A box contains 5 red marbles and 10 blue marbles. You can take 3 marbles at random, without replacement. You win a dollar if all 3 marbles are the same color.
(a) What is the probability of winning this game?
(b) Given that your friend played the game and won, what is the probability all the marbles she got were blue?
(c) If you play the game 5 times (replacing the marbles after each round), what is the chance you win at least twice?
Determine the probability that between 5 and 10 minutes will pass between successive occurrences.
A researcher believes that the percentage of people who exercise in California is greater than the national exercise rate. The national rate is 20%. The researcher gathers a random sample of 120 individuals who live in the California and finds tha..
Develop a spreadsheet model to determine the optimal number of magazines to order each day. Use 500 replications and round the demand values generated by the normal random number generator (RNG) to the closest integer value.
The sampling plan is perhaps the single most important aspect of generalizing research findings beyond the study sample. In a quantitative research study, what method of sampling allows for the greater generalization of findings?
A national survey of restaurant employees found that 75% said work stress had a negative impact on their personal lives. A sample of 100 employees from a popular restaurant chain finds that 68 answer
Determine the probability the transmission will break down between 100,000 and 200,000 miles?
Chi square compares actual data with expected data. What would the expected data be? For example, if I know the percentage of brown M&Ms in a bag is 40% set by the company
Assume that 5% of men and only .25% of women are colorblind. A colorblind person is chosen at random:
The branch manager of a pet supply store wants to study characteristics of customers of his store. In particular, he decides to focus on two variables
The following data (in pounds), which were selected randomly from a normally distrubuted population of values, represent mearsurements of a machine part that is supposed to weigh, on average, 8.3 pounds.
A researcher conducts an experiment comparing two treatment conditions and obtains data with 10 scores for each treatment condition.
The length of time for one individual to be served at a cafeteria is a random variable having a lognormal distribution with a mean of 10 minutes and standard deviation of 2 minutes.
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