Question

) A manufacturer of sprinkler systems designed for fire protection claims that the average activating temperature...

  1. ) A manufacturer of sprinkler systems designed for fire protection claims that the average activating temperature is at least 135℉ . To test this claim, you randomly select a sample of 32 systems and find that the mean activation temperature is 133℉ . Assume that the population standard deviation is 3.3℉ . At α=0.05, do we have enough evidence to reject the manufacturer’s claim? (Please write your answers in complete sentences.)
  2. Identify the claim and state the Null and Alternate Hypotheses.
  3. Find the critical values and identify the rejection regions.
  4. State whether you are using the t-test or the z-test. (Give reasons for your answer)
  5. Decide whether to reject or fail to reject the null hypothesis.
  6. Interpret the decision in the context of the problem. Assume the population is normally distributed.
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 manufacturer of sprinkler systems used for fire protection in office buildings claims that the true...
A manufacturer of sprinkler systems used for fire protection in office buildings claims that the true average system-activation temperature is 130o F. A sample of n = 9 systems, when tested, yields a sample average activation temperature of 131.08o F. If the distribution of activation times is normal with standard deviation 1.5o F, does the data contradict the manufacturer’s claim at a significance level of 0.01? Answer this question via the following parts: a) What is the parameter of interest?...
A manufacturer of sprinkler systems used for fire protection in office buildings claims that the true...
A manufacturer of sprinkler systems used for fire protection in office buildings claims that the true average system-activation temperature is 130°. A sample of n = 9 systems, when tested, yields a sample average activation temperature of 131.08°F. If the distribution of activation times is normal with standard deviation 1.5°F, does the data contradict the manufacturer’s claim at significance level α=.01?
A sprinkler system for fire protection in buildings is required to have an average activation temperature...
A sprinkler system for fire protection in buildings is required to have an average activation temperature of 130o F. A randomly selected sample of N = 12 systems are tested with an average sample activation temperature of x = 129.7o F. It is known that the distribution of activation temperatures is normally distributed with a standard deviation s = 1.25o F. using the P-value hypothesis test method, if the sample data contradicts the required average activation temperature at a significance...
in a survey if 460 drivers from the south, 402 wear a seat belt. in a...
in a survey if 460 drivers from the south, 402 wear a seat belt. in a survey of 370 driver from the northeast, 275 wear a seat belt. at a =0.06 can you support the claim that the proportion of drivers who wear seat belts is greater in the south than in the northeast? Assume the random samples are independent l. complete parts a) through e) identify the claim and state Ho and Ha the population of the proportion of...
An energy company wants to choose between two regions in a state to install energy-producing wind...
An energy company wants to choose between two regions in a state to install energy-producing wind turbines. A researcher claims that the wind speed in Region A is less than the wind speed in Region B. To test the regions, the average wind speed is calculated for 60days in each region. The mean wind speed in Region A is 13.7 miles per hour. Assume the population standard deviation is 2.8miles per hour. The mean wind speed in Region B is...
5. The results of a state mathematics test for random samples of students taught by two...
5. The results of a state mathematics test for random samples of students taught by two different teachers at the same school are shown below. Can you conclude there is a difference in the mean mathematics test scores for the students of the two teachers? Use α= 0.01. In addition, assume the populations are normally distributed and the population variances/standard deviations are not equal. State the null and alternate hypotheses (write it mathematically) and writeyour claim. Find the standardized test...
A sociologist claims that children spent more time watching television in 1981 than children do today....
A sociologist claims that children spent more time watching television in 1981 than children do today. A study was conducted in 1981 to find the time that children watched television on weekdays. Recently, a similar study was conducted. The results of these studies (in hours per weekday) are shown below. Assume the population standard deviation is 0.8 for 1981 and 0.6 for today. At α=0.05, can you support the sociologist's claim? Complete parts (a) through (d) below. 1981 1981 2.5...
The annual salaries​ (in dollars) of 14 randomly chosen fire fighters are listed. At a=0.05​, is...
The annual salaries​ (in dollars) of 14 randomly chosen fire fighters are listed. At a=0.05​, is there enough evidence to support the claim that the standard deviation of the annual salaries is different from $5400​? Assume the population is normally distributed. Complete parts​ (a) through​ (e) below. 50,760 40,978 52,376 46,496 41,734 40,201 51,108 52,047 43,817 34,951 35,075 28,241 32,700 37,958 Write the claim mathematically and identify Ho and Ha Find the critical value x^2o= Identify the rejection region Find...
A nutritionist claims that the mean tuna consumption by a person is 3.2 pounds per year....
A nutritionist claims that the mean tuna consumption by a person is 3.2 pounds per year. A sample of 80 people shows that the mean tuna consumption by a person is 2.9 pounds per year. Assume the population standard deviation is 1.13 pounds. At alphaequals 0.04​, can you reject the​ claim? A-identify the null and alternate hypothesis B-Identify the standardize test statistic C-find P Value D-decide to reject or fail to reject the null hypothesis
Hypothesis Testing Using Rejection Regions. In Exercises 7–12, (a) identify the claim and state H0 and...
Hypothesis Testing Using Rejection Regions. In Exercises 7–12, (a) identify the claim and state H0 and Ha, (b) find the critical value(s) and identify the rejection region(s), (c) find the standardized test statistic z, (d) decide whether to reject or fail to reject the null hypothesis and (e) interpret the decision in the context of the original claim. 7. Vaccination Requirement A medical researcher says that less than 80% of U.S. adults think that healthy children should be required to...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT