The Water Resource Department claims that the mean pH level of the river water is 6.8. You randomly select 19 water samples and measure the pHof each. The sample mean and standard deviation are 6.7 and 0.24. Is there enough evidence to reject the company's claim at 5% level ofsignificance?a. Which of the following statistical tests is most appropriate in this scenario?Two-Tailed Z-TestOne-Tailed Z-TestTwo-Tailed T-TestOne-Tailed T-Testb. What are the appropriate hypotheses for the test?O Ho : µ = 6.8 H1 : µ # 6.8Ho : µ + 6.8 H1 :µ = 6.8Ho : µ = 6.8 H1 : µ > 6.8O Ho : µ = 6.8 H1 : µ < 6.8c. After conducting the appropriate significance test, the test statistic was found to be -1.816.Therefore, the conclusion for the test is:Reject Ho, because p-value is less than 0.05O Fail to reject Ho, because -1.816 falls outside the critical regionReject H1, because -1.816 falls within the critical regionO Fail to reject Ho, because p-value is less than 0.05

Given,sample size(n)=19sample mean(x¯)=6.7sample standard deviation(s)=0.24population…

Answered: The Water Resource Department claims…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

Ms. Wall administered a push-up test to her adapted PE class. There were 6 students in the class. What would be the standard deviation for the class if: Mean = 3 Median = 2.5 Mode = 2 ∑x=18 ∑x² =62 Group of answer choices 0.6 1.3 1.7 2.6 There is not enough information to calculate standard deviation
Scores on a statistics final in a large class were normally distributed with a mean of 73 and a standard deviation of 6. Use the empirical rule to answer the following questions. a. Estimate the proportion of the scores less than 67. b. Estimate the proportion of the scores more than 85. c. Estimate the proportion of the scores between 61 and 79.
1. Gentle Ben is a Morgan horse at a Colorado dude ranch. Over the past 8 weeks, a veterinarian took glucose readings from this horse (in mg/100 ml). The sample mean is 93.8, with a standard deviation of 12.5. The population mean glucose level for horses should be 85. Do these data indicate that Gentle Ben has an overall average glucose level higher than 85? Use a a= 0.05. (Hint: use the t-Distribution). Given Sumple mem: 93.8, SD = 12.5, PM: 85, α = 0,05
Use the following scenario to answer the next 6 questions. An engineer has designed a valve that will regulate water pressure on an automobile engine. The valve was tested on 30 engines and the mean pressure was 4.8 psi with a standard deviation of 1 psi. If the valve was designed to produce an overall mean pressure of 5.0 psi, is there sufficient evidence at the 10% level of significance that the valve performs below specifications? Choose the statement that matches your decision & conclusion. Group of answer choices Fail to reject the null: there is NOT sufficient evidence that the valve performs below specifications. Fail to reject the null: there IS sufficient evidence to conclude that the valve performs below specifications. Reject the null: there is NOT sufficient evidence that the valve performs below specifications. Reject the null: there IS sufficient evidence that the valve performs below specifications.
You may need to use the appropriate technology to answer this question. The Insure.com website reports that the mean annual premium for automobile insurance in the United States was $1,503 in March 2014. Being from Pennsylvania at that time, you believed automobile insurance was cheaper there and decided to develop statistical support for your opinion. A sample of 25 automobile insurance policies from the state Pennsylvania showed a mean annual premium of $1,425 with a standard deviation of s = $160. (a) Develop a hypothesis test that can be used to determine whether the mean annual premium in Pennsylvania is lower than the national mean annual premium. Ho: HS 1,503 H: µ > 1,503 Ho:H > 1,503 H: µ< 1,503 H0: μ2 1,503 H3: H< 1,503 Ho:H< 1,503 H.: μ2 1,503 Ho: H = 1,503 H: µ # 1,503 (b) What is a point estimate in dollars of the difference between the mean annual premium in Pennsylvania and the national mean? (Use the mean annual premium in Pennsylvania minus the national mean.) (c) At a…
The sample uric acid levels of selected basketball and tennis players of the same age and gender in a certain university were tested. The result is shown below. Is there a difference in the mean uric acid levels between basketball and tennis players? Use a = 0.05. Sample Standard Deviation Group Basketball players Mean 15 4.5 1.0 Tennis players 15 3.4 1.5
please answer a, b, c
The weight gains of animals during a period of confinement follow a normal distribution of mean 39.0 and standard deviation 1.0 kg. Answer the following questions.a. Above what weight gain are 99% of the animals?
Consider a set of data in which the sample mean is 27 and the sample standard deviation is 6.2. Calculate the z-score given that x = 28.5. Round your answer to two decimal places. An
the weight of an organ in adult males has a bell shaped distribution with a mean of 350 grams and a standard deviation of 50 grams. use the empirical rule to determine the following a. about 99.7% of organs will be between what weights? b. what percentage of organs weighs 300 grams and 400 grams ? Plzz explain both question. Ty
Consider a set of data in which the sample mean is 30.230.2 and the sample standard deviation is 7.87.8. Calculate the z-score given that x=31.4x=31.4. Round your answer to two decimal places.
A random sample of 22 Midtown residents in Atlanta has been selected to be studied for their expenditure on theater tickets. The mean of spending for this group is $135 with a standard deviation of $39. The mean value of ticket expenditure in Atlanta that has been recorded for the past decade is $120. Discuss the below points: 1. What is the alternative hypothesis in this assignment? 2. Calculate the standard error of the mean for the study above. Please provide only typed answer solution no handwritten solution needed allowed

SEE MORE QUESTIONS

Recommended textbooks for you

MATLAB: An Introduction with Applications

Statistics

ISBN:

9781119256830

Author:

Amos Gilat

Publisher:

John Wiley & Sons Inc

Probability and Statistics for Engineering and th…

Statistics

ISBN:

9781305251809

Author:

Jay L. Devore

Publisher:

Cengage Learning

Statistics for The Behavioral Sciences (MindTap C…

Statistics

ISBN:

9781305504912

Author:

Frederick J Gravetter, Larry B. Wallnau

Publisher:

Cengage Learning

MATLAB: An Introduction with Applications

Statistics

ISBN:

9781119256830

Author:

Amos Gilat

Publisher:

John Wiley & Sons Inc

Probability and Statistics for Engineering and th…

Statistics

ISBN:

9781305251809

Author:

Jay L. Devore

Publisher:

Cengage Learning

Statistics for The Behavioral Sciences (MindTap C…

Statistics

ISBN:

9781305504912

Author:

Frederick J Gravetter, Larry B. Wallnau

Publisher:

Cengage Learning

Elementary Statistics: Picturing the World (7th E…

Statistics

ISBN:

9780134683416

Author:

Ron Larson, Betsy Farber

Publisher:

PEARSON

The Basic Practice of Statistics

Statistics

ISBN:

9781319042578

Author:

David S. Moore, William I. Notz, Michael A. Fligner

Publisher:

W. H. Freeman

Introduction to the Practice of Statistics

Statistics

ISBN:

9781319013387

Author:

David S. Moore, George P. McCabe, Bruce A. Craig

Publisher:

W. H. Freeman

SEE MORE TEXTBOOKS