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A study is conducted to assess the impact of caffeine consumption, smoking, alcohol consumption, and physical activity on cardiovascular disease. Suppose that 40% of participants consume caffeine and smoke. If 8 participants are evaluated, what is the probability that:
Exactly half of them consume caffeine and smoke?More than 6 consume caffeine and smoke?Exactly 4 do not consume caffeine or smoke?In computing this, fully discuss:What do the results suggest?
How might you use this data from this sample size to develop a smoking cessation program at your workplace?
Construct a 90% confidence interval for the population proportion p . Does your result agree with your conclusion in part (a)?
Also suppose that the probability that the current player does not reach the semifanals of the tournament is 0.58 and that there is a 0.71 probability that jill is ranked next weekon the WTA circuit. What is the probability that the current player..
Compute the variance and standard deviation of the number that will arrive within two days.
A professor obtains SAT scores and freshman grade point averages (GPAs) for a group of n=15 college students. The SAT scores have a mean of M=580 with SS=22,400, and the GPAs have a mean of 3.10 with SS=1.26, and SP=84.
Make your calculation supposing a two-sided two-sample t-test with a type I error (alpha) of 0.056
Calculate the standard error. With 95% confidence, find out the margin of error?
A number of minor automobile accidents occur at various high-risk intersections in Teton County despite traffic lights. The Traffic Department claims that a modification in the type of light will reduce these accidents.
Solve following for x, expressing answers as compound fractions and integers where appropriate:
A researcher selects a random example of college students and measures number of hours they spend watching television per week and their grade point average.
You wish to be 95% confident and have an error of 0.4 mpg. The standard deviation is estimated at 1.8. How big must the sample be?
If the computer manufacturer decides to sample 2,300 of the microchips received in each shipment, what acceptance number, c, would they want?
A hospital human resources manager finds that the local average starting salary for nurses is $24,000. She randomly samples 10 nurse's salaries at the hospital and calculates a mean of $23,450 and a standard deviation of $400.
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