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Europeans are increasingly upset at their leaders for making deep budget cuts to many social programs that are becoming too expensive to sustain. For instance, the popularity of then President Nicolas Sarkozy of France plummeted in 2010, giving him an approval rating of just 26% (The Wall Street Journal, July 2, 2010).
a) What is the probability that fewer than 60 of 200 French people gave President Sarkozy a favorable rating?
b) What is the probability that more than 150 out of 200 French people gave President Sarkozy an unfavorable rating?
In trying to estimate the amount of growth that took place in the trees recently planted by the county parks commission
Deriving the regression equation, testing the model fit and obtains confidence interval for estimated values.
You play a game with two possible outcomes. Outcome A has probability 0.4 and outcome B has probability 0.6. When B occurs you win $2.00; otherwise, you lose $1.00. What is your expected value for this game?
Find a 90% confidence interval for the mean decibel level µ for this type of transit vehicle.
question 1 the average price of a gallon of unleaded regular gasoline was reported to be 3.13 in illinois. use this
The monthly average sales of the Smiling Ninja Computer Company may be approximated to a normal distribution curve. It has a mean of $22,000 and a standard deviation of $3,300.
From a random sample we know that the average duration of unemployment in a low developed region A is 147 days (with standard deviation sA = 32 days and nA = 230 unemployed).
A financial analyst estimates that the probability that the economy will experience a recession in the next 12 months is 20%. She also believes that if the economy enters a recession
How many participants need to be enrolled in each group to have 90% chance of detecting a significant difference using a two-sided test with a a= .05 if compliance is perfect?
Use technology to find the estimated minium required sample size. The minimum sample size required is ? Computer users round to the nearest whole number. What is a major obstacle to getting a good estimate of the population mean?
Two variables in her spreadsheet, and finds r = 0.06. She decides to conclude there is no relationship between the variables. Was she correct?
Having obtained the z score and then derived the percentage... what does the percentage tell you?
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