Comparing scales: In an experiment to determine whether there is a systematic difference between the weights obtained with two different scales, 10 rock specimens were weighed, in grams, on each scale. The following data were obtained:

Specimen Weight on Scale 1 Weight on Scale 2
1

12.35

12.51

2

15.08

14.99

3

9.00

9.10

4

11.55

11.47

5

24.36

24.35

6

9.88

10.00

7

15.36

15.55

8

7.05

7.04

9

13.39

13.57

Let μ1 represent the mean weight on Scale 1 and ud= μ1-μ2

Can you conclude that the mean weight on Scale 1 is less than the mean weight on Scale 2?

Use the a=0.10 level of significance.

The federal reserve controls certain interest rates in the united states. investors often try to speculate as to whether the federal reserve will raise or lower rates and by how much. suppose a company conducts extensive interviews with financial analysts, and as a result, predicts that "thefed" will increase rates by an average of 0.25 percentage points every six months for the forseeable future. which type of equation could be used to model the predicted interest rates over the next several years, assuming no other significant changes? a) a linear equation b) a quadratic equation c) a polynomial equation d) an exponential equation