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The machine has just been filled with 50 black, 150 white, 100 red and 100 yellow gumballs that have been thoroughly mixed. Sue and Jim approached the machine first. They both said they wanted red gum balls. What is the likelihood they will get their wish?
A mortar shell is s feet above the ground after t seconds, where s=f(t)= -16t + 510t +63. Find the height of the shell 15 seconds after it is fired.
A recent article in Vitality magazine reported that the mean amount of leisure time per week for American men is 40.0 hours. You believe this figure is too large and decide to conduct your own test.
State the null hypothesis and the alternate hypothesis. State the decision rule. Compute the value of the test statistic. What is your decision regarding the null hypothesis?
Assume that the mean SAT score in Mathematics for 11th graders across the nation is 500, and that the standard deviation is 100 points. Find the probability that the mean SAT score for a randomly selected group of 150 11th graders is between 475 a..
In your organization's management development program, there was a heated discussion between people who claimed that theory is impractical and not effective
Assume the population standard deviation (s) is 0.5 and the sample size (n) is 100. Calculate the values for alpha, a type I error and beta, a type II error. (To calculate Beta, consider a mean that is 1 standard error away from the lower end valu..
How many subsets of S contain either the number 6 or the number 15?
Promotion occurs on average every 10 days in a large corporation. What is the probability that the next promotion will occur within:
At the .05 significance level, is there a difference in the mean number of calls per day between the two employees?
The random variable x is known to be uniformly distributed between 70 and 90. The probability of x having a value between 80 to 95 is
Find the indicated percentage for the normally distributed variable. Round your answer to two decimal places, if necessary.
The rate of defects among CD players of a certain brand is 1.1%. Use the Poisson approximation to the binomial distribution to find the probability that among 240 such CD players received by a store, there is at most one defective CD player.
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