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A researcher is trying to study the happiness level of all current NUS students. Which of the following is/are (an) example(s) of probability sampling methods?
(I) The researcher gets a list of all current NUS students' emails from the administrative office and randomly selects 100 students' emails. He then emails them a link to a short e-survey. 50 students replied to his survey.
(II) The researcher invites all final year NUS students in his faculty to visit his lab for a psychological test to determine their happiness level, with a promise to compensate them for their time with a $10 voucher. 200 students turned up for the test.
Suppose you estimate a regression model to predict weekly expenditures on food per person. Would you be pleased if your model estimate a Standard Error =$300 EXPLAIN?
Please explain by using the traditional methods for testing hypotheses and showing the results of all steps in the process.
the distribution of the amount of money in savings accounts for university of miami students has an average of 1100
Think about the state of the United States in 1936
Test to determine if the antisense drug lowered the cholesterol using a = 0.01 and the prob-value approach.
Company reveal that 70% of the workers are married, 36% are college graduates, and half of the college graduates are married. What is the probability that a randomly chosen worker is?
Fit additive and multiplicative decomposition models to these data(Monthly Wine Sales).- Fit the Winter's triple exponential smoothing model to these data.
(a) Identify any outliers and? (b) draw a modified boxplot that represents the data set.
Make a list of at least three cars that you would consider purchasing. To be fair, the cars should be in the same class (compact, midsize, etc). they should also be of the same age.
Among students who usually get A's and B's in school, what percentage never or rarely uses sunscreen when going out in the sun for more than one hour? Explain whether this value is a row percentage or a column percentage.
Why might a t test not be very useful in this case?
A recent visit to a nursing home showed how many times nursing residents fell in the last 24 months.
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