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The average time spent studying for a class was more than 120 minutes per week among previous students of that class. A sample of 66 students has an average time of 112 minutes. Suppose the population standard deviation is 3.5 minutes.
a) State the hypothesis
b) calculate the test statistic
c) give the p-value
d) provide the appropriate alpha value at 95% confidence
e) use the p-value to make a decision about the hypothesis
In the following enthymemes, determine whether the missing statement is a premise or a conclusion.- If a symphony orchestra has effective fund-raisers, it will survive; and the Cleveland symphony has survived for years.
Why don't researchers who want to test hypotheses about the relationships between variables worry a great deal about random sampling?
Suppose that each of 300 patients has a probability of 1/3 of being helped by treatment independent of its effect on the other patients.
If you take the mean weights for random groups of 10 adults and form a new distribution, how will this new distribution compare to distribution of individuals?
In 1984 the country of Morocco in an attempt to determine the average amount of time that tourists spend in that country on a visit tried two different sampling procedures.
A student must choose one of the subjects, art, geology, or psychology, as an elective. She is equally likely to choose art or psychology and twice as likely to choose geology.
a. Construct an estimate of the regression equation using the same variables. b. Produce the appropriate residual plots to determine if the linear function is the appropriate regression function for this data set.
(a) What are the reasons larger companies and rule makers are in favor of the switch to IFRS?
a suburban hotel derives its gross income from its hotel and restaurant operations. the owners are interested in the
Write an interaction model for E(y) as a function of Flavor Name and Cognitive Load.- Use the information in the table to estimate the β's in the interaction model.
Compute the coefficient of variation for current account balances for male and female account holders.
For each of the following sampling situations, identify the population as exactly as possible. That is, say what kind of individuals the population.
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