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Computing relative frequencies in a contingency table
A survey of a sample of 347 people is conducted. The survey's respondents are classified according to their political affiliation and their opinion on a bill. The results are given in the contingency table below.
Opinion on the billIn favor of Opposed to Indifferent toPolitical affiliation Democrat 18 50 35Republican 46 40 31Independent 49 35 43
What is the relative frequency of respondents who are indifferent toward the bill?
Round your answer to at least two decimals places.
Does the normal distribution yield a good approximation of the actual results?
At the .01 significance level can we conclude the mean age is more than 8.4 years for the cars of university students? What is the p-value?
You are presented a 90% confidence interval for the difference in population mean scores (with drug - without drug) of (-17.81, -7.24). What can you conclude from this interval?
What is the point estimate of the mean planned expenditure by all Americans taking long summer vacations in 2002?
The so-called "Gambler's Fallacy" makes the mistake of not recognizing:
Given that we have collected pairs of observations on two variables X and Y , we would consider fitting a straight line with X as an explanatory variable if:
Assume duration of human pregnancies follow mound-shaped distribution with mean of 266 days and the standard deviation of 16 days.
One environmental group did a study of recycling habits in a California community. It found that 73% of the aluminum cans sold in the area were recycled. (Round your answers to four decimal places.)
Difference in the mean number of times men and women order take-out dinners in a month? What is the p-value?
Find out the Expected value of the perfect information for the given problem. Given the subsiquent cost tree, illustrate what is the expected outcome.
If the probability that it will rain tomorrow is 0.33, then what is the probability that it will not rain tomorrow?
Roger has read a report that the weights of adult mail Siberian tigers have a distribution which is approximately normal with mean μ = 390 lb and σ = 65 lb.
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