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A 1982 study indicated that 40% of young adults (18-25 years old) in the U.S. smoked cigarettes. In a later survey of 1500 young adults, 536 were found to be smokers. Do the data indicate that the smoking rate for young adults in the U.S. has decreased significantly? (alpha = 0.01)a) Dose the data indicate the smoking rate for young adults in the US has changed significantly?b) Use a confidence interval with appropriate level of confidence to conduct the test in a).
Write down the regression equation and state the R-squared value and the standard error and explain what they mean with respect to the data.
1. length of pregnancies the length of human pregnancies from conception to birth varies according to a distribution
What are the mean earnings of males and females in this sample? Does the regression result support the claim in the news and You decide to control for age (in years) in your regression results because older people, up to a point
How closely does the number of trading accounts relate to the total assets of the 10 largest online stock brokerages? The table below presents data on these brokerages. The number of accounts is in thousands, and assets are in billions of dollars.
The events Ac and Bc are independent
5. Sixto Sanchez is the owner of Suburban Stylists. He is evaluating the service level provided to walk-in customers. Because he is enrolled in an MBA program at Eastern University, Sixto decides to sample walk-in customers for the next two w..
Beanie Babies are toy stuffed animals that have become valuable collector's items. Beanie World Magazine provided the information on 50 Beanie Babies given in beanie.xls.
Generate syntax and output files in SPSS. You will need to copy and paste these into your Application document. Use one kind of chart (any kind) to describe the data
Estimate the population mean, and the population standard deviation is unknown, we are hit with a "double whammy" when it comes to the margin of error. Explain what the "double whammy" is and why it occurs. (Hint: Consider the sources of variation in..
you are expected to complete a project related to inferential statistics. the project must contain the following
Format your data in a Microsoft® Excel® spreadsheet. Need some advice and guidance on setting this up in excel. Currently working on trying to figure out the formulas and how to arrange the data. Also looking at how to set up excel to calculate the i..
If a person bought 1 share of Google stock within the last year, what is the probability that the stock on that day closed at less than the mean for that year? Hint: You do not want to calculate the mean to answer this one. The probability wou..
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