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A random sample of 8 petrol stations in each of three European countries A, B and C was taken. The price per litre at each station was recorded in Euros. The prices are given below.
A 7.80 8.00 7.98 8.20 8.00 7.99 8.10 7.90
B 8.01 7.75 8.00 7.77 8.01 8.01 8.12 8.20
C 8.10 7.92 8.01 7.88 8.30 8.22 8.56 8.10
Discuss ways of analysing this data from the point of view of having a standard price for petrol in the EU.
Regression analysis works with the basic formula of a line, which is Y = mX + b. We can use it to look at causation. Think about the Lemonade Stand Game.
The proportion of drivers who use seat belts depends on things like age, gender, ethnicity, and local law. As part of a broader study, investigators observed a random sample of 117 female Hispanic drivers in Boston; 68 of these drivers were wearin..
A local college requires an English composition course for all freshman. This year they are evaluating a new online version of the course. A random sample of n=16 freshman is selected and the students are placed in the online course.
Using an example from a hospital, create a mock data set for two specific variables of importance within hospital (minimum of 20). The data may be used for quality measures, patient inputs, demographics, financial data, etc.
Conclude that the population average pulse rate is 71.8. Reject the hypothesis that the population average pulse rate is 70.
what is the probability of obtaining at least 6 cases in this class if the nationwide rate holds True?
A retail federation conducted a nationwide survey of 1000 adults last October and found that approximately 55% of the respondents planned to do some type of Halloween decorating.
The sample mean, the sample proportion and the sample standard deviation are all unbiased estimators of the corresponding population parameters. True or false (please provide a solution or explanation).
Make three-month and four-month moving averages for this time series. Does the three-month or four month moving average provide the better forecast? Explain.
The hypothesis that the samples came from identical populations cannot be rejected, the T value is 16.5 greater that the lower limit.
Some defendants in criminal proceedings plead guilty and are sentenced without a trial, whereas others who plead innocent are subsequently found guilty and then are sentenced.
A random sample of 100 voters found that 44% were goint to vote for a certain candidate. Find the 99% limit for the population proportion of voters who will vote for that candidate.
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