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In a public opinion poll, 48% of 189 respondents favor an elimination of taxes on dividend income.
How many respondents would be needed to calculate a 95% confidence interval (for the proportion of people who favor an elimination of taxes on dividend income) that has a total width no greater than 4% (i.e., the estimate must be within +/- 2% of the true population proportion)?
Explain how we test independent against dependent variables in a regression analysis? What's the set up? How are regression analyses often misused / misinterpreted at work or in the news? Cite an example.
Citing significant strides in math and science by women of all ethnic backgrounds, the College Broad says that the male-female gap on Scholastic Assessment Test scores continue to narrow among high school students.
Give an example of how Regression Analysis can be used in your work to make a business decision. Give the dependent and independent variables.
If a six appears for the second time, the process is repeated with the move depending on the number shown and the previous throws. If a six appears for the third time, the turn of the player ends without moving the token.
A student team examined parked cars in four different suburban shopping malls. One hundred vehicles were examined in each location. Research question: At α = . 05, does vehicle type vary by mall location?
Polls showed the two main candidates in the 2004 presidential election were nearly tied on the day before the election. To predict the winner a newspaper would like to have a poll that has margin of error less than 1%. Roughly how large a sample w..
Write up your results by using scientifically recognized form.
If and are the proportions of all college males and females correspondingly, who worked last summer, the z statistic (±0.01) for a test comparing the proportions of college men and women who worked last summer is??
Which component of a time series is most likely to occur? Which component has a pattern that must be complete in a single year and repeat from year to year?
Make a histogram for the r probability distribution.
According to a recent survey of 500 randomly selected residents of Popular City, it was found that 38% are in favor of raising city taxes in order to build a new stadium for the local baseball team. (a) What is the population of interest of the su..
What kind of correlation do you expect to find between annual income and amount spent on car? Will it be positive or negative?
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