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The World Bank collected data on the percentage of GDP that a country spends on health expenditures ("Health expenditure," 2013) and also the percentage of women receiving prenatal care ("Pregnant woman receiving," 2013). The data for the countries where this information are available for the year 2011 is in table #10.1.8. Creat a scatter plot of the data and find a regression equation between percentage spent on health expenditure and the percentage of women receiving prenatal care. Then use the regression equation to find the percent of women receiving prenatal care for a country that spends 5.0% of GDP on health expenditure and for a country that spends 12.0% of GDP. Which prenatal care percentage that you calculated do you think is closer to the true percentage? Why?
In the past the average length of an outgoing telephone call from a business office has been 143 seconds. A manager wishes to check whether that average.
Suppose that students in a particular school are all very competent. For each individual, the probability that they will pass the proficiency exam (independent of thier classmates) is 0.99
What does a squared correlation coefficient represent? Also, does the strength of the correlation depend on the direction? Finally, does correlation imply causation.
How many citizens would need to be sampled if a 99% confidence interval was desired to estimate the true proportion to within 1%?
the weight of food packed in certain containers is a random variable with a mean of 16 oz. and a standard deviation of
9 of 199 males receiving tPa and 13 of 97 males in control group died within 12 months. Create observed and expected contingency tables for these data.
Given your answer in part (a), which of these two alternative headlines do you think would be preferable: "Breast-feeding leads to better school performance" or "Link found between breast-feeding and school performance"? Explain.
1. Construct a scatter plot 2. Find the value of the linear correlation coefficient r. 3. Find the critical values of r from attached table (see attachment). Use α = 0.05
CS544 Module - Calculate the inclusion probabilities using the S82 variable. Using these values, show the sample drawn using systematic sampling. Show the frequencies for each region (REG). Show the percentages of these with respect to the entire ..
A discrete random variable Y takes the value -1, 0 and 1 with probabilities 1/2θ, 1- θ and 1/2θ respectively. Let Y1 and Y2 be two independent random variables, each with the same distribution as Y.
what is the 25th percentile of a x2 distribution with 20 degrees of freedom? what symbol is used to denote this
the reply has to be 300-400 wordsa what are the characteristics of the standard normal distribution?b the hr
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