View the step-by-step solution to:


 2.1 Which of the following sampling techniques is most appropriate for sampling the

diurnal fluctuations of nutrient concentrations in a stream? Provide justification for your answer.

a Random sampling

b Simple stratified sampling

c Systematic sampling

2.2 Provide logical reasoning as to why a single sample storage/preservation protocol is not appropriate for all investigations.

2.4 Multiple determination results from monitoring benzene concentrations (mg L_1) in a groundwater well are listed below.

Measurement Benzene (mg L_1)

.       1 3.35 

.       2 2.25 

.       3 2.09 

.       4 2.01 

.       5 2.15 

Calculate the sample mean and standard deviation for this study.

2.5 An analyst performed five replicate measurements of total lead concentration (mg L_1) in a given wastewater sample. Use Excel to calculate the sample mean and standard deviation from the data below:

3.4 3.9 4.1 3.6 3.7 mg L_1 

Recently Asked Questions

Why Join Course Hero?

Course Hero has all the homework and study help you need to succeed! We’ve got course-specific notes, study guides, and practice tests along with expert tutors.


Educational Resources
  • -

    Study Documents

    Find the best study resources around, tagged to your specific courses. Share your own to gain free Course Hero access.

    Browse Documents
  • -

    Question & Answers

    Get one-on-one homework help from our expert tutors—available online 24/7. Ask your own questions or browse existing Q&A threads. Satisfaction guaranteed!

    Ask a Question
Ask Expert Tutors You can ask 0 bonus questions You can ask 0 questions (0 expire soon) You can ask 0 questions (will expire )
Answers in as fast as 15 minutes