Question

To calibrate a thermometer, a technician tests it on water whose temperature is known to be...

To calibrate a thermometer, a technician tests it on water whose temperature is known to be 40◦F. She gets the following readings (all in degrees Fahrenheit): 49, 38, and 41. Based on this data, should she recalibrate the device?

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

Homework Answers

Answer #1

Here we have to test the following hypothesis

In order to do so, we use the t-test for mean with n-1 degree of freedom, whose test statistics is given by

Here

So under null hypothesis H0 and using data, we get t=0.8128 with 3-1=2 df. To compair this with 5% critical value, we use the table of t-distribution, and obtain it as 4.3027. Notice that this value is greater than the calculated t value. So we can not accept the null hypothesis, that is true mean is not equal to 40 or she should recalibrate the device .
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
Create a program that the simulates a thermometer and displays its temperature using different units. 1-...
Create a program that the simulates a thermometer and displays its temperature using different units. 1- Temperature Interface (Temperature.java) This interface should declare the following two abstract methods: • getTemperature      o Returns a String o Accepts no arguments • setTemperature      o Returns void o Accepts one double argument 2- Abstract Thermometer Class (Thermometer.java) This abstract class must implement the Temperature interface and contain: • One private field (a double) named degrees • One constructor that accepts a double...
Last week, Shantal made a broccoli and cheddar cheese quiche for a potluck lunch with four...
Last week, Shantal made a broccoli and cheddar cheese quiche for a potluck lunch with four of her coworkers. She prepared the quiche the night before the luncheon. When she opened the egg carton that she purchased 6 weeks earlier, she noticed that almost all of the eggs had small cracks in their shells. The egg carton had been stored in the refrigerator, under the heavy milk jug. Shantal did not have time to shop for fresh eggs, so she...
For each of the following scenarios determine if a single sample mean z test, single sample...
For each of the following scenarios determine if a single sample mean z test, single sample mean t test, paired samples t test, or independent means t test should be conducted. Explain why that procedure is appropriate A. In the population of American adults, is the mean body temperature different from 98.6 degrees Fahrenheit? Data were collected from a sample of 40 American adults.  [3 points] B. Do PSY 298 students score differently on the Module 5 and Module 6 quizzes?...
For the following experiments/questions, pick the most appropriate statistical test. You have the following statistical tests...
For the following experiments/questions, pick the most appropriate statistical test. You have the following statistical tests as choices: some may be used more than once, others not at all.  Assume homogeneity of variance (where applicable) and the validity of parametric tests (where applicable), unless something is directly stated (e.g., “the data are not at all normal”) or otherwise indicated (viz., by the inspection of the data) which would indicate a strong and obvious violation of an assumption. This means you must...
What are standard conditions of ΔH° for the data you will use? Temperature 0 K 100...
What are standard conditions of ΔH° for the data you will use? Temperature 0 K 100 K 273 K 298 K Pressure 1.0 Pa 100 Pa 1.0 bar 100 bar Concentration 1.0 g/L 1.0 mol/L 1.0 mg/L mol/kg Select the complete reactions (including phases) for the reaction between solid NaOH and a solution of HCl. 2NaOH(s) + HCl(aq) → 2NaCl(aq) + H2O(l) NaOH(s) + HCl(aq) → NaCl(aq) + H2O(l) NaOH(s) + HCl(aq) → NaCl(s) + H2O(l) Calculate the theoretical ΔH°r...
The quantity of dissolved oxygen is a measure of water pollution in lakes, rivers, and streams....
The quantity of dissolved oxygen is a measure of water pollution in lakes, rivers, and streams. Water samples were taken at four different locations in a river in an effort to determine if water pollution varied from location to location. Location I was 500 meters above an industrial plant water discharge point and near the shore. Location II was 200 meters above the discharge point and in midstream. Location III was 50 meters downstream from the discharge point and near...
The quantity of dissolved oxygen is a measure of water pollution in lakes, rivers, and streams....
The quantity of dissolved oxygen is a measure of water pollution in lakes, rivers, and streams. Water samples were taken at four different locations in a river in an effort to determine if water pollution varied from location to location. Location I was 500 meters above an industrial plant water discharge point and near the shore. Location II was 200 meters above the discharge point and in midstream. Location III was 50 meters downstream from the discharge point and near...
PLEASE ANSWER ALL PARTS Case Studies Tasks: Revisit Jane (One Last Time): Jane was riding her...
PLEASE ANSWER ALL PARTS Case Studies Tasks: Revisit Jane (One Last Time): Jane was riding her horse on a warm sunny day (101 degrees Fahrenheit) when suddenly her horse stopped and reared up in the air. Jane was not prepared for this and fell hard backwards into the ground. As she hit the ground Jane's leg was gashed open by a large, sharp boulder that she fell next to. Jane began to bleed severely. Jane's body spends the next couple...
1. Electronic blood pressure devices require the use of a stethoscope. * a. True b. False...
1. Electronic blood pressure devices require the use of a stethoscope. * a. True b. False 2. The odd-numbered pounds on an upright scale are marked with numbers. * a. True b. False 3. The gatch handles to the bed should be left out at all times. * a. True b. False 4. You should tell the patient that you are counting her respirations. * a. True b. False 5. For good posture and even weight distribution, the patient’s feet...
n what follows use any of the following tests/procedures: Regression, multiple regression, confidence intervals, one sided...
n what follows use any of the following tests/procedures: Regression, multiple regression, confidence intervals, one sided T-test or two sided T-test. All the procedures should be done with 5% P-value or 95% confidence interval.Some answers are approximated, choose the most appropriate answer. Open Pollution data. SETUP: Is it reasonable to claim that cities with precipitation of less than 100 days have average temperature of less than 65 degrees F? Given the data your job is to confirm or disprove this...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT