The coefficient of variation for the male pulse rates is __ % The coefficient of variation for the female pulse rates is __%

A food bank investigates if the number of times their donors walk by a homeless person each week impacts donors’ charitable contribution to the food bank. The data are presented below in standard form.     # of homeless people seen each week Donation to food bank Donor ZX ZY 1 -1.3 0.36 2 0.64 -0.09 3 -1.1 1.26 4 -0.14 0.14 5 1.41 -0.54 6 -0.52 -0.09 7 1.03 -1.9 8 0.64 -0.99 9 0.83 0.36 10 -1.49 1.49   What does ΣZXZY equal? A) 941B) 7.86C) -7.16D) -4.44       What is the correlation (Pearson’s r) between the number of homeless people donors see each week and their donation to the food bank (rounded to 2 decimal places)?  A) .98B) -.80C) .72D) -.56     What is the obtained t-value for this r? A) -2.96B) -16.35C) -3.72D) -1.89     What are the degrees of freedom?  A) 4B) 20C) 8D) 10      What is the critical t-value?  A) 3.68B) 2.31C) 2.01D) 3.30     What is your conclusion?  A) There is…

A comprehensive survey released by a college reports that the true proportion of all students at the college who use drugs is 0.3. You survey 100 students in your dorm and record that the proportion of students who use drugs is 0.15. The proportion of all students at this college who use drugs is a _____________________ and the proportion of students who use drugs in your dorm is a _______________________.     a. statistic; parapeter   b. parameter; statistic   c. population; sample   d. measure of central tendency; measure of variability   e. non of the above

Animal breeding help needed!