q04 sa3 Statistics ♨ Name:
y = 1.29098x + 38.079
Data table
Age | HR |
18 | 75 |
19 | 57 |
19 | 64 |
20 | 54 |
20 | 56 |
20 | 60 |
20 | 73 |
20 | 75 |
21 | 54 |
21 | 56 |
22 | 52 |
22 | 81 |
23 | 60 |
23 | 80 |
24 | 68 |
25 | 70 |
26 | 75 |
26 | 92 |
27 | 64 |
28 | 66 |
28 | 77 |
The table provides data on the age versus heart rate for males in MS 150.
- _________ Calculate the sample size n.
- _________ Calculate the slope of the linear regression (best fit line).
- _________ Calculate the y-intercept of the linear regression (best fit line).
- _________ Is the relation between age and heart rate positive, negative, or neutral?
- _________ Calculate the linear correlation coefficient r for the data.
- ______________ Is the correlation none, weak/low, moderate, strong/high, or perfect?
- ______________ Determine the coefficient of determination.
- ______________ What percent in the variation in
age
"explains" the variation in
heart rate
- _________ Use the slope and intercept to predict
the heart rate for a
30 year old male.
- _________ Use the slope and intercept to determine
the age for a male with a heart rate of 60 beats per minute
- _________ Use the slope and intercept to predict
the heart rate for a
50 year old male.
- _________ Is the projected heart rate for a 50 year old male a reasonable heart rate for human?
count 21
slope: 1.29098
intercept: 38.08
correl: 0.37
coef det 0.14
y given x 76.81 m/s
x given y 16.98 km
y given x 102.63 m/s
Generating ods file