Question

The mean alkalinity level of water specimens collected from the Han River in Seoul, Korea, is...

The mean alkalinity level of water specimens collected from the Han River in Seoul, Korea, is 50 milligrams per liter. (Environmental Science & Engineering, September 1, 2000.) Consider a random sample of 100 water specimens collected from a tributary of the Han River. Suppose the mean and standard deviation of the alkalinity levels for the sample are sample mean = 67.8 mg/L and s = 14.4 mg/L. Is there sufficient evidence to indicate that the population mean alkalinity level of water in the tributary exceeds 50 mg/L?

Use significance level 0.05

a. State the null and alternate hypothesis

b. Calculate the test statistic

c. Calculate the p-value

d. Write your conclusion

Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
a. 200 mL of water sample was collected from a river. 5 mL of the river...
a. 200 mL of water sample was collected from a river. 5 mL of the river water diluted to 1 L. A BOD bottle which is 300 mL is filled with this water and aerated. The dissolved oxygen content was 7.8 mg/L initially. After 5 days, the dissolved oxygen content had dropped to 4.8 mg/L. What is BOD5 of this sample? b. Hydraulic conductivity of soil is measured as 2 x 10-2 cm/sec. After an accident, a truck carrying dissolved...
Water quality measurements are taken daily on the Wyatt River. Shown below are the concentrations of...
Water quality measurements are taken daily on the Wyatt River. Shown below are the concentrations of phosphates in solution, in milligrams per liter (mg/L), for an 14-day period. 1.31      1.39      1.59      1.68       1.89      1.98      1.97      1.74      1.59      1.67      1.59       1.78      1.97      1.84 a) Assuming an unknown variance, compute the 95% two-sided confidence interval of the mean concentration of phosphate. b) Assuming the engineer cannot take any additional measurements, compute the confidence level α associated with a confidence interval of ±0.10...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT