MS 150 Statistics

AgeHeart rate
21 54
20 55
20 55
24 57
27 57
21 62
19 64
21 64
20 66
19 67
20 67
21 70
18 72
20 72
25 72
21 73
20 74
22 74
21 75
21 75
20 76
21 76
21 77
19 78
19 80
20 80
24 80
19 81
19 82
21 82
  1. _________ Calculate the sample size n.
  2. ______________ Calculate the slope of the linear regression trend line for the data.
  3. ______________ Calculate the y-intercept of the linear regression for the data.
  4. ______________ Is the relationship positive, negative, or neutral?
  5. ______________ Calculate the correlation coefficient r for the data.
  6. ______________ Is the correlation none, weak/low, moderate, strong/high, or perfect?
  7. ______________ Determine the coefficient of determination r².
  8. ______________ What percent in the variation in the age accounts for the variation in the heart rate?
  9. ______________ Use the slope and intercept to predict the heart rate for a 23 year old female.
  10. ______________ Use the slope and intercept to predict the age for a female with a heart rate of 60.
  11. ______________ Use the slope and intercept to predict the heart rate for a 3 year old female.
  12. ______________ Use the slope and intercept to predict the heart rate for a 83 year old female.
  13. ______________ Are the last two calculations valid?