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Problem: Learning online. Many colleges offer online versions of courses that are also taught in the classroom. It often happens that the students who enroll in the online version do better than the classroom students on the course exams. This does not show that online instruction is more effective than classroom teaching, because the people who sign up for online courses are often quite different from the classroom students.
Required:
1. Suggest some differences between online and classroom students that might explain why online students do better.
Find the sample mean and sample standard deviation for the amount of unspent money returned at the end of the day.
Use suitable one or two sided test for null hypothesis of no difference in them then changes rating between groups at 0.10 significance level.
the hawks are currently winning 0.55 of their games. there are 5 games in the next two weeks. what is the probability
No estimate of the population proportion is available. How large a sample is required?
If a random sample of 40 voters is chosen, approx. the probability that more than 20 favor this candidate. Use the normal approximation to the binomial with a correction for continuity.
allstate would like to test the hypothesis that the average age of an imported car on the road is greater than the
Fawns Fawns among1 or 5 months old in Mesa Verde National Park have a body weight that is approximately normally distributed with mean
When asked to construct numeric hypotheses, what does this entail? How does one format research questions and sub-questions?
What can you say about the results of the hypothesis test: H0: mean = 5 vs. H1: mean not equal to 5 tested using the same sample at the same level of significance? reject H0 in the second test and do not reject H0 in the second test
Carry out suitable multiple comparison procedure to determine the source of the difference.
Set up the null and alternative hypotheses for testing these claims. In order to conduct the test, the customer selected a significance level of alpha=.05. Interpret this value. (I.e. what does it mean to conduct the test at a level of alpha=.05)
a company manufactures 13 types of cars. prior to full-scale production 4 of each type are made and a sample of 5 cars
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