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The length of a rod is normally distributed with mean 4 inches and variance 0.01 square inch. Two such rods are placed end to end and fitted into a slot. The length of the slot is 8 inches with a tolerance of -0.1 to 0.1 inch. What is the probability that the two rods will fit?
Construct a 90% two-sided confidence interval onthe difference between the proportion nonconforming in processes 1 and 2. Based on this confidence interval, can you conclude at a significance level of 10% that the difference is not equal to 10%? W..
He received a score of 70 on a biology test for which the class mean was 70 with standard deviation of 4. On which test did he do better relative to the rest of the class?
A standard IQ test has mean of 98 and a standard deviation of 16. We want to be 99% certain that we are 8 IQ points of the true mean. Determine the sample size.
The outcome of the toss is announced to II. Then II must guess whether I chose the fair or biased coin. If II is correct there is no payoff. If II is incorrect, she loses 1. Draw the game tree.
A sociologist interested in cultural differences compared women of two ethinic groups on a Role Approval Index. If you conduct a t test for independent means, how many degrees of freedom are in the t distribution?
The manufacturer of a nationally known "lite beer" claims that the approval rating for it's product is at least 85%. A local soft drink manufacturer has retained a marketing agency to test the "lite beer".
"Suppose that we conducted a survey in which we asked 800 people the following question: "In the event of an emergency, would you seek medical assistance at the emergency room of our hospital?"
An averageof 2 cars arrive at a highway tollgate every 10 seconds. If this rate is approximated by a Poisson process, what is the probability that exactly 3 cars will arrive in a 10-second period?
Please use a combination of content and supportive examples.
For a standard normal curve, find the z-score that separates the bottom 90% from the top 10%.
Your high school graduating class had 564 members. Thirty-three percent of these are expected to attend college. The probability that less than 160 will attend college is
A manager of a gasoline filling station is thinking about a promotion that she hopes will bring in more business to the full-service island. She is considering the option that when a customer requests a fill-up
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