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The time needed to complete a final examination in a particular college course is normally distributed with a mean of 80 minutes and a standard deviation of 10 minutes. Answer the following questions.
a. What is the probability of completing the exam in one hour or less?
b. What is the probability that a student will complete the exam in more than 60 minutes but less than 75 minutes?
c. Assume that the class has 60 students and that the examination period is 90 minutes in length. How many students do you expect will be unable to complete the exam in the allotted time?
A researcher would like to determine whether an over-the-counter cold medication has an effect on mental alertness. A sample of n = 16 participants is obtained and each person
The front hall display case. The display case is 30 inches tall. Which scale will allow her to make the tallest model that will fit in the display case?
You are the member of the marketing team at Sara Bellum's Pizza - the pizza for people who think too much!! Your mission is to evaluate two locations and determine if there is any difference in their suitability as locations for the next Sara Bell..
What do you find out when you perform the nonparametric statistics?
The Warren County Telephone Company claims in its annual report that "the typical customer spends $70 per month on local and long-distance service.
A case-control study is performed to study the relationship between esophageal cancer and an exposure (exposure A).
A supplier of 3.5" disks clams that only 1% of the disks are defective. In a random sample of 600 disks, it is found that 3% are defective, but the supplier claims that this is simply a sample fluctuation. At the 0.01 level of significance, test t..
Solve the following problems in essay form (1 to 2 paragraphs for each problem is fine). Please show all work and show how you came up with the answer.
Distributed with a mean of $150 and standard deviation of $25. About how many of the students spend less than $100 on books?
Determine the probability that: a) Exactly 3 will have this mild side effect.
How many participants need to be enrolled in each group to have 90% chance of detecting a significant difference using a two-sided test with a a= .05 if compliance is perfect?
What id Steve's grade point average at graduation and what is Steve's median grade point at graduation
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