Question

An agricultural scientist planted alfalfa on several plots of land, identical except for the soil pH....

An agricultural scientist planted alfalfa on several plots of land, identical except for the soil pH. Below is a table with the dry matter yields (in pounds per acre) for each plot.

   

pH

4.6

4.8

5.2

5.4

5.6

5.8

6.0

Yield

1,056

1,833

1,629

1,852

1,783

2,647

2,131

1)The slope of the least-squares line for predicting yield from pH is closest to:

2)The y-intercept of the least-squares line for predicting yield from pH is closest to:

3)The correlation coefficient of the least-squares line for predicting yield from pH is closest to:

4)The estimate of s, the error standard deviation, of the least-squares line for predicting yield from pH is closest to:

Homework Answers

Answer #1

The statistical software output for this problem is :

1) Slope = 737.101

2) Intercept = -2090.942

3) correlation coefficient = 0.7829

4)  error standard deviation = 329.025

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
An agricultural scientist planted alfalfa on several plots of land, identical except for the soil pH....
An agricultural scientist planted alfalfa on several plots of land, identical except for the soil pH. Below is a table with the dry matter yields (in pounds per acre) for each plot. pH 4.6 4.8 5.2 5.4 5.6 5.8 6.0 Yield 1,056 1,833 1,629 1,852 1,783 2,647 2,131 a) what is the slope of the least-squares line for predicting yield from pH is closest to? a)1,405.3 b)1521.5 c)-2090.9 d)-1521.5 b) The y-intercept of the least-squares line for predicting yield from...
Crops growth depends on many factors (temperature, humidity etc.). One of them is soil acidity. The...
Crops growth depends on many factors (temperature, humidity etc.). One of them is soil acidity. The table below shows the crop and soil pH in 7 plots side by side (all of the other growing conditions are identical except the pH) Soil pH 4.6 4.8 5.2 5.4 5.6 5.8 6 Crop [lb/acre] 1056 1833 1629 1852 1783 2647 2131 5.1 (6%) Calculate the correlation coefficient between the crop and pH, assuming there is a linear correlation between the two of...
An agricultural scientist used four test plots to determine the relationship between wheat yield y (in...
An agricultural scientist used four test plots to determine the relationship between wheat yield y (in bushels per acre) and the amount of fertilizer x (in hundreds of pounds per acre). The table shows the results. Fertilizer, x Yield, y 1.0 31 1.5 39 2.0 47 2.5 55 (a) Find the least squares regression line y = ax + b for the data by solving the system for a and b 4b + 7.0a = 172 7b + 13.5a =...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT