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A professor hypothesizes that students who earn a C or better in her class spend more time outside of class studying than students who receive a D or F. She collects the following data from two samples of students. What does she conclude?
Number of hours studying per week for C or better students: 8, 4, 4, 2, 1, 5, 3, 2, 3
Number of hours studying per week for D or F students: 6, 2, 1, 0, 3, 2, 1
Assume there are 18 homes in the Quail Creek area and 9 of them have a security system. Five homes are selected at random: what is the probability all five of the selected homes have a security system?
An instructor wanted to know the relationship between his review sessions and passing the final exam. He recorded whether students attended his review session.
Assume we want to use a 0.05 significance level to test the claim. a. Identify the null hypothesis and the alternative hypothesis.
If demand is normally distributed, a basic EOQ is appropriate. a single-period model could not be appropriate. we should produce to fill demand, rather than filling it through orders.
You are evaluating the steps in a core process using a FMEA(Failure Modes and Effects Analysis). The scales to rate severity, occurrence, and detection have been created and agreed upon by the team. How would you use the FMEA to prioritize the c..
What is the 'statistics text index' number, rounded to the nearest tenth, for the 1985 edition with the 2000 price as the reference value?
Using a 5% level of significance, is there any difference in proportion of guests who would select the two resorts? What is your conclusion?
Why is variance, as a measure of variability, preferred to the range, the IQR, and the SIQR?
An important application of sensitivity analysis occurs in problems involving multiple attributes. Many decision makers experience difficulty in assessing trade-off weights.
There is not enough information to answer the question, the formula requires knowing the population standard deviation for Mark and Debbie, and we were not given this information.
a. Complete a probability tree for this situation. b. Find the probability that you will be awarded the contract.
Mr. Pickwick takes his umbrella. When rain is not forecast, he takes it with probability 1/3. Find: (a) the probability that Pickwick has no umbrella, given that it rains.
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