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For each of the following statements, state the population parameter of interest, state the appropriate null and alternative hypotheses and indicate whether the appropriate test will be a two-tailed, a left tailed or a right tailed test.i. The average age a person registers to vote in Australia is greater than 20 years.
ii. The majority of students in a particular university course who attend lectures has changed from 75%, since lecture recordings have become freely available to students.
iii. A typical high school student in Melbourne spends more than $50 a week on mobile phone calls
Let X = duration of Old Faithful geyser (in seconds), and let Y = time (in minutes) until next eruption Is there a relationship between X and Y ? What is P (a
A medical test for malaria is subject to some error. Given a person who has malaria, the probability that the test will fail to reveal the malaria is 0.06. Given a person who does not have malaria, the test will correctly identify that the person ..
a national survey of graduate students is conducted to assess thier consumption of coffee. the table below summarizes
The service times of the arrivals are independent exponential random variables with rate μ, and are independent of the arrival process. Customers depart the system when their service ends. Let N be the number of arrivals before the ?rst departure.
Use a 1% level of significance to test the claim that there are more calls during the night than in the day.
In measuring the diameter of a cylinder to the nearest millimeter the sample space (in cm) is S = {5.3, 5.4, 5.5, 5.6, 5.7}.
Using the 0.10 level of significance, is there evidence that the mean shopping time at the local supermarket is different from the claimed value of 22minutes?
there is a 25 chance that a fuse of a certain type is defective. approximate the probability of having more than or
What's the probability that a person selected at random from the NYPD is a female?- What's the probability that a person selected at random from the NYPD is a detective?
Was given an experiment or an observational study? Explain.- Is it reasonable to conclude that the candy caused guests to tip more? Explain.
Assignment - Approximate Confidence Intervals with the Normal and t Distribution. What does "95% confident" mean? Explain in the context of the application
For a given level of significance, if the sample size is increased: the power of the test will increase we will have more responses to log and calculate it will skew the mean to the right it has no effect on the direct results.
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