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Pollsters attempt to find out whether or not person is a "likely voter" before they count their opinion in poll. If we suppose 40% of registered voters will really vote, in the random sample of 100 registered voters we can be 95% confident that somewhere between _____ and _____ of them will really vote. Fill in the blanks with the number.
Find out the slope, b, and the intercept, a, for the least-squares line. Write the equation of the least squares line.
Determine the sample size necessary to estimate a population mean to within 1 with a 90% confidence given that the population standard deviation is 10, Suppose that the sample was calculated at 150. Estimate the population mean with 90% confidence..
Perform a proper analysis. Describe your null and alternative hypothesis, report the p-value. What is your conclusion?
Consumer Price Index is: a. a weighted aggregate price index where the weight for each item is its current-period quantity. b. a weighted aggregate price index where the weight for each item is its last-period quantity. c. an index that is designed t..
Using a 1% level of significance, can the hypothesis that the distributions for the student's scores are identical be accepted?
What sample size would be needed to obtain an error of ±10 square millimeters with 99 percent confidence?
A population of scores forms a normal distribution with a mean of μ = 40 and a standard deviation of σ =12.
The following data values are a simple random sample from a population that's normally distributed with (symbol for variance) o2=4.0:
Assume that Los Arboles had a special program in place to encourage helmet use. Elucidate to what extent did removal of the outlier improve the fit.
The times needed to fall asleep are assumed to follow a normal distribution. The results for the two nights for the ten volunteers are shown below:
If the payoff from outcome A is twice the payoff from outcome B, then the ratio of these utilities will be.
An entrepreneur in a developing country owns 10 food carts. He has ten employees to work with these food carts. Let Xi be a random variable representing revenue from cart i (on a particular day), i = 1,..., 10. Xi is approximately normally distrib..
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