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Although founded only in 2004, Facebook has more than 500 million active users, of which 50% log on to Facebook on any given day. In a recent survey by Facebook, young users (those born after 1984) were asked about their preference for delivering the news about breaking up a relationship (The Wall Street Journal, November 27 -2 8, 2010). One of the shocking results was that only 47% of users preferred to break the news in person. A researcher decides to verify the survey results of Facebook by taking her own sample of 200 young Facebook users. The preference percentages from Facebook and the researcher's survey are presented in the following table.
At the 5% level of significance, test if the researcher's results are inconsistent with the survey results conducted by Facebook. Provide the details, using the p -value approach.
Find an equation of the least squares regression line. Please show your work. Is there a linear correlation between "x" and "y" at the 0.01 significance level? Please justify your answer.
Make a scatterplot showing the connection between average verbal SAT (y) and the percent of graduates who took the SAT in a state (x).
How many degrees of freedom are there - The smallest expected count will be in the epidural/ no breastfeeding cell. What is it
A professional hockey goal is 6 feet wide and 4 feet high. What is the area of the goal in square yards?
Suppose 12% of these workers work more than 48 hours. Based on this percentage, what is the standard deviation of number of hours worked per week.
an accounting firm is planning for the next tax preparation season. from last years returns the firm collects a
For the random variables below, indicate whether you would expect the distribution to be best described as geometric, binomial, Poisson, exponential, uniform, or normal and explain in one sentence why so?
Assume the least squares equation is Y' = 10 + 20X. What does the value of 20 indicate?
Use MegaStat's output for multiple regression to determine the multiple regression equation
Refer to Grocery retailer Problem 6.9. The observations are listed in time order. Assume that regression model (12.2) is appropriate. Test whether or not positive autocorrelation is present; use α = .05. State the alternatives, decision rule, and ..
A study finds that during blizzards, online sales are highly associated with the number of snow plows on the road; the more plows, the more online purchases. The director of an association of online merchants suggests that the organization should ..
what is the required sample size is the error is to be less than 1/2 hour with a 95% level of confidence?
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