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Question: Suppose that the time students wait for a bus can be described by a uniform random variable X, where X is between 0 minutes and 60 minutes.
a. What is the probability that a student will wait between 0 and 30 minutes for the next bus?
b. What is the probability that a student will have to wait at least 30 minutes for the next bus?
What are the center line and control limits for a p chart for plotting monthly proportions of defective orders? What is the smallest number of bad orders in a month that will result in a point above the upper control limit?
Suppose that on a true/false exam you have no idea at all about the answers to three questions. You choose answers randomly and therefore have a 50-50 chance.
Downhill Ski Resort in Colorado has accumulated information from records of the past 30 winters regarding the measurable snowfall. This information is as follows:
Here is a remarkable fact: the first digits of the numbers in long tables are usually not equally likely to have any of the 10 possible values.
In reporting the results of their survey of a simple random sample of U.S. registered voters, pollsters claim 95% confidence that their sampling error is no more than 4 percentage points. Given this information only, what sample size was used?
Find the most appropriate statistical procedure: Teacher of low-level reading group interested in average score for group of 25 students?
a multiple choice test consists of 60 questions. each question has four possible answers and each question has one
This model is fit to the data using the method of least squares using statistical software, and the following ANOVA table is obtained
Find the probability of correctly answering the first 2 questions on a multiple choice test if random guesses are made and each question has 3 possible answers.
If public education fails to improve the quality of instruction in both primary and secondary schools, then it is likely that it will lose additional students.
Operators are to answer telephone calls from customers in an average time of 0.1 minute or less, and either respond to or refer to the proper department within 0.5 minute.
A number x is formed by choosing six digits in order, each being a 9 or a 1 and equally likely. Describe the sample space and count the number of sample points it contains.
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