Really need help with my Statistics homework! I can\'t seem to figure it out so
ID: 3195799 • Letter: R
Question
Really need help with my Statistics homework! I can't seem to figure it out so any help on any of the questions would be greatly appreciated. Thank you!
1. Suppose that we were determining the effects of smoking on heart disease. We found that amongst smokers in a certain age range, a proportion of.4173 with heart disease and amongst non-smokers we had a proportion of.1172 with heart disease. Determine AR and AR% Answers AR = 2. Determine the standard deviation of the data set to 3 decimal places Answer 1 1 3 4 5 6. 6.22 6.84 6.97 7 814.3 3. A new program was developed to hopefully reduce the risk of injury to college athletes. Several colleges were chosen to use the new program and compared to several colleges that did not use the program. The data is summarized in the table below. Determine the relative risk of injury for those not using the new program. Injured 217 384 Not Injured 3226 2782 Answer Using Program Not Usin Answer 4. Given a data set with a mean of x = 15.3 and a standard deviation of s = 1.1 , determine the z-score for the data value x-16.8 5. Suppose that our data set has a mean of 360 and a standard deviation of 12.5 Determine the coefficient of variation. AnswerExplanation / Answer
Answer for second question
2) Standard Deviation (S)= sqrt(sigma ((x-x')^2)/N)
x'= (1+1+3+4+5+6.1+6.22+6.84+6.97+7+8+14.3)/12 = 69.43/12 = 5.78583
sigma(x-x')^2 = 22.84+22.84+7.7284+3.1684+0.6084+0.1024+1.1236+1.4161+1.4884+4.9284+72.5904 = 138.8345
S= sqrt(138.8345/12)
S=3.401
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.