Final answer:
Accuracy and precision describe the nature of data measurements with respect to their target values. Tests of dependent means involve repeated measures on the same subjects, and systematic sampling is used for selecting survey participants at regular intervals.
Step-by-step explanation:
The question pertains to the concepts of accuracy and precision in measurements as well as hypothesis testing and sampling design in statistics.
a. A precise, but inaccurate set of measurements consistently hits the same spot, but not the target spot. A dartboard with darts clustered together, yet off-center, illustrates this scenario.
b. A set of measurements that is both precise and accurate consistently hits the target spot. On a dartboard, this means hitting the bullseye with every dart.
c. A set of measurements that is neither precise nor accurate has no consistent pattern and doesn't hit the target spot. Darts scattered all over the dartboard without clustering illustrate this.
Regarding the student's technique to lower anxiety levels before exams, it is a test of dependent means because the same students' anxiety levels are measured twice.
The technique used at the health club for surveying every tenth customer is known as systematic sampling, a method where members are selected at regular intervals through the ordered list.
Finally, when performing a hypothesis test on matched or paired samples, it is true that two measurements are drawn from the same pair of individuals and two sample means are compared to each other. Hence, answer choices B and C are both true.