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Question: Lucky guessing? A friend of yours who took the multiple choice quiz in Exercise got all 6 questions right, but now claims to have guessed blindly on every question. If each question offered 4 possible answers, do you believe her? Explain, basing your argument on a simulation involving at least 10 trials.
Exercise: Multiple choice. You take a quiz with 6 multiple choice questions. After you studied, you estimated that you would have about an 80% chance of getting any individual question right. What are your chances of getting them all right? Use at least 20 trials.
A group of items of data have been found to be normally distributed with a mean of 80 and a standard deviation of 6. Please convert 80 to a z-score and show the calculation.
A teacher divides her class into two groups. One group is taught a lesson on the computer and the other is taught by traditional lecture. The teacher then gives a test to see that group has better grades.
Provides a measure of skewness in the distribution of X. Determine the value of b3 for this distribution and using a suitable distributional approximation, find the probability that the mean of a random sample of n = 25 observations will exceed 2.5.
The assembly time for a product is uniformly distributed between 6 to 10 minutes.
The U.S. government is attempting to determine whether immigrants should be tested for a contagious disease.
If the M&M s are packaged in the stated proportions, how many of each color should the author have expected to get in his bag?
a salesperson either makes a sale s or does not make a sale n with each of two potential customers. the simple events
An ergodic random process has a correlation function. - What is the mean of this process?
To con?rm persistent rumors that the preference for PEPSI on engi- neering college campuses is higher in the Northeast of the United States than on comparable campuses in the Southeast, a survey was carried out on 125 engineering stud..
We consider a system composed of three components placed in parallel and operating independently. The lifetime Xi(in months) of component I has an exponential distribution with parameter A, for i = 1,2,3.
Will the sum of squared deviation scores be greater for the test or the exam (assume the same number of people sat both the test and the exam)? Why?
Find the mean, median, and mode of the unemployment rate and Find the variance, standard deviation, and coefficient of variation.
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