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A news article reports on a study published in Lancet in 1996: "Researchers experimented on themselves, letting honeybees sting them repeatedly and then comparing whether scraping a stinger after two seconds resulted in a smaller weal than yanking it out as quickly."22 Why did the researchers compare weal sizes, instead of simply reporting how painful the sting was?
The following data are annualized returns on a group of 15 stocks- Find the median, the first and third quartiles, and the 55th and 85th percentiles for these data.
a cereal manufacturer has a machine that fills the boxes. boxes are labeled 16 oz so the company wants to have that
Test for the existence of a nonzero linear correlation in the "population" of prices of the two stocks. For your sample, use as many daily prices as you can.
a poker hand consists of 5 cards chosen randomly from a standard 52 card deck.a find the chance that you are dealt a
Satisfaction survey. A cable provider wants to contact customers in a particular telephone exchange to see how satisfied they are with the new digital TV service the company has provided. All numbers are in the 452 exchange, so there are 10,000 po..
Explain what a Chi-Squared Test is used for and give an example how you could possibly use this test. What is an ANOVA test? Create an example where this test could be used.
Point out your final decision concerning hypothesis test and compute p-value for test.
Draw a box plot for the data in given problem. Are there any outliers? Is the distribution of the data symmetric or skewed? If it is skewed, to what side?
two students from a certain university are randomly selected from all other students who attend that university. the
a large chain retailer purchases a certain kind of electronic device from a manufacturer. the manufacturer indicates
Use confidence interval to determine the estimated margin of error, Then determine the sample mean.
a bank has just made 200 car loans. the banks records indicate that about 7 of their customers make late payments on
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