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Recent low-fare flights between Britain and eastern European destinations have brought large groups of English partygoers to cities such as Prague and Budapest.
According to the New York Times, cheap beer is a big draw, with an average price of $1 as compared with $6 in Britain. Assume these two reported averages were obtained from two random samples of 20 establishments in London and in Prague, and that the sample standard deviation in London was $2.5 and in Prague $1.1.
Conduct a test for equality of means using α = 0.05 and provide a 95% confidence interval for the average savings per beer for a visitor versus the amount paid at home in London.
a statistics practitioner would like to estimate a population mean to within 50 units with 99 confidence given that the
a) What is average number of trucks (to the nearest 0.1 trucks) in the unloading system? b) What is average time per truck (to the nearest 0.1 minutes) in the system?
a system used to read electric meters automatically requires the use of a 128-bit computer message. occasionally random
The standard deviation of a list of numbers is a measure of how much the numbers deviate from the averag
Assume the null hypothesis is that μ = 50 and that the graph shown below is the sampling distribution of the mean (M). Would a sample value of M= 60 be significant in a two-tailed test at the .05 level? Roughly what value of M would be needed to b..
in a sample of 56 addicts 28 were given a new drug to help them overcome their addiction while the remaining 28 were
the evidence linking global warming to human activity-such as burning fossil fuels-is weak. therefore human activity
in each of the following find the pdf of y. show that the pdf integrates to 1.a y x3nbspand fxx 42x51-x 0ltxlt1b y
Department store accepts three types of credit cards, MasterCard, Visa, and their own store card. Charges are normally distributed. A random sample of 18 credit card purchases included 6 MasterCard
1. A business research topic. Strengthen and improve initial proposal.2. A brief literature review of the research topic. Produce 2 to 3 pages on background information on your research topic.
Using Non-parametric test, whether there is significant difference in the motor coordination skills.
Never forget that even small effects can be statistically significant if the samples are large. Of 148 small businesses, 106 were headed by men and 42 were headed by women.
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