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A recent research report shows that the percentage of college students who have been reported for plagiarizing has reached 30% each in the colleges of Education, Arts and Sciences, and Business, but only 10% in the School of Law. The XYZ University does a random sample of 2000 pieces of student work submitted over the last three years, all of which had been identified as plagiarized. There were 660 papers from the College of Education, 560 papers from the College of Arts and Sciences, 500 papers from the College of Business, and the remainder from the School of Law. At the 0.05 significance level, can we assume the data in the research report is representative of XYZ University?
a. What is the hypothesis?
b. What is the null hypothesis?
c. What is the decision rule?
d. What do you conclude (Accept or reject the null)?
e. What is the 'plain English' answer?
At the .01 significance level, is there a relationship between job pressure and age?
Plan the scatter diagram
(a) Find the median cost of houses at Coal City in 1988. (b) Find the modal selling price of houses at Coal City in 1988.
The amount of time a bank teller spends with each customer has a population mean = 3.1 minutes and population standard deviation = 0.4 minute.
Write the hypothesis statement. What distribution are you using?
Probability distribution described by the following density curve and The expected value of the sum of the weights of the two oranges, in pounds
The number of viewers of American Idol has a mean of 29 million with a standard deviation of 5 million. Assume this distribution follows a normal distribution.
Using Binomial approximation, find the proportion of the days that will be rejected.
A multiple regression equation for list price of homes in certain community in USA is=170,000 -850 X 1 + 28,000 X 2 , where X 1 signifies age in years and X 2 signifies number of rooms.
Using the .10 level of significance, can we conclude that the assembly time using the new method is faster?
A group of three students is to be randomly selected froma group of 1 freshman, 1 sophomore, 3 juniors and 3 seniors. Let Y1 and Y2 denote the number of juniors and seniors, a) What is the joint probability distribution for Y1 and Y2?
A demonstration to verify that an item meets its reliability requirement is based on obtaining 5 successful tests. If the probability of a successful test is 0.9, find the probability that 10 tests will be required to pass the demonstration.
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