An appliance manufacturer claims to have developed a compact microwave oven that consumes a mean of no more than 250 W. From previous studies, it is believed that power consumption for microwave ovens is normally distributed with a population standard deviation of 15 W. A consumer group has decided to try to discover if the claim appears true. They take a sample of 20 microwave ovens and find that they consume a mean of 257.3 W. The null hypothesis will be rejected at 1% level of significance. Question 21 options: 1) No 2) Yes 3) Do not know

An appliance manufacturer claims to have developed a compact microwave oven that consumes a mean of no more than 250 W. From previous studies, it is believed that power consumption for microwave ovens is normally distributed with a population standard deviation of 15 W. A consumer group has decided to try to discover if the claim appears true. They take a sample of 20 microwave ovens and find that they consume a mean of 257.3 W. The null hypothesis will be rejected at 1% level of significance. Question 21 options: 1) No 2) Yes 3) Do not know

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter4: Equations Of Linear Functions

Section: Chapter Questions

Problem 8SGR

See similar textbooks

Similar questions

An appliance manufacturer claims to have developed a compact microwave oven that consumes a mean of no more than 250 W. From previous studies, it is believed that power consumption for microwave ovens is normally distributed with a population standard deviation of 15 W. A consumer group has decided to try to discover if the claim appears true. They take a sample of 20 microwave ovens and find that they consume a mean of 257.3 W. The appropriate hypotheses to determine if the manufacturer's claim appears reasonable are Question 18 options: 1) H0 : μ ≤ 250 versus H1 : μ > 250. 2) H0 : μ ≥ 257.3 versus H1 : μ < 257.3. 3) H0 : μ = 250 versus H1 : μ ≠ 250. 4) H0 : μ ≥ 250 versus H1 : μ < 250.
An automobile manufacturer has given its van a 31.0 miles/gallon (MPG) rating. An independent testing firm has been contracted to test the actual MPG for this van since it is believed that the van performs over the manufacturer's MPG rating. After testing 150 vans, they found a mean MPG of 31.2. Assume the population standard deviation is known to be 2.1. Is there sufficient evidence at the 0.02 level to support the testing firm's claim? Step 2 of 6: Find the value of the test statistic. Round your answer to two decimal places.
An automobile manufacturer has given its van a 53.1 miles/gallon (MPG) rating. An independent testing firm has been contracted to test the actual MPG for this van since it is believed that the van performs under the manufacturer's MPG rating. After testing 200 vans, they found a mean MPG of 52.9. Assume the population standard deviation is known to be 1.6. Is there sufficient evidence at the 0.05 level to support the testing firm's claim? Step 4 of 6 : Find the P-value of the test statistic. Round your answer to four decimal places.
A sports equipment company develops a type of synthetic fishing line which is claimed to have an average strength of 8 kg and a standard deviation of 0.5 kg. It is known that with a sample of 50 synthetic fishing rods the average strength is 7 kg. With a significance level of 0.01, Test the hypothesis that the population mean really equals 8 kg
Using traditional methods, it takes 10.4 hours to receive a basic driving license. A new license training method using Computer Aided Instruction (CAI) has been proposed. A researcher used the technique with 23 students and observed that they had a mean of 10.8 hours with a standard deviation of 1.9. A level of significance of 0.1 will be used to determine if the technique performs differently than the traditional method. Assume the population distribution is approximately normal. State the null and alternative hypotheses. E Keypad E Tables Keyboard Shortcuts Answer "H Submit Answer O 2021 Hawkes Learning search 31°F Clear ^ E %96
Using traditional methods, it takes 9.0 hours to receive a basic flying license. A new license training method using Computer Aided Instruction (CAI) has been proposed. A researcher used the technique with 17 students and observed that they had a mean of 9.2 hours with a standard deviation of 1.1. A level of significance of 0.1 will be used to determine if the technique performs differently than the traditional method. Assume the population distribution is approximately normal. Find the value of the test statistic. Round your answer to three decimal places
Using traditional methods, it takes 11.5 hours to receive a basic flying license. A new license training method using Computer Aided Instruction (CAI) has been proposed. A researcher used the technique with 2020 students and observed that they had a mean of 11.6 hours with a standard deviation of 1.6. A level of significance of 0.1 will be used to determine if the technique performs differently than the traditional method. Assume the population distribution is approximately normal. Make the decision to reject or fail to reject the null hypothesis. Is it a reject null hypothesis or is it a fail to reject null hypothesis
A researcher is conducting a study to determine the mean trough dosage of medication for a population. Assume a previous study was conducted for the same medication and the mean trough dose was found to be 300 mg with a standard deviation of 30 mg. If the researcher wants to be 95% confident the true mean trough dosage of the medication is within 10 mg of the true mean trough dosage, what sample size is needed?
The U.S. Center for Disease Control reports that in year 1900, the mean life expectancy is 48 years for whites and 46.9 years for nonwhites with a stanard deviation of 11.1 years and the nonwhites had a stanard deviation of 15.6 years. Suppose the representative populations were 29,000 whites and 96,000 nonwhites. Conduct a hypothesis test at the 0.1 level of significance to determine whether there was no difference in mean life spans in the county for whites and nonwhites in year 1900. Preliminary: Is nw≥30 and nnw≥30 ? Yes No Test the claim: Determine the null and alternative hypotheses. H0H0: μw μnw HaHa: μw μnw Determine the test statistic. Round to four decimal places.z= Find the pp-value. Round to 4 decimals.pp-value = Make a decision. Reject the null hypothesis. Fail to reject the null hypothesis. Write the conclusion. There is not sufficient evidence to support the claim that whites and nonwhites have different mean life spans. There is sufficient…
The Weston Rescue Service and the Mid-Valley Ambulance Service are tested for response times. A sample of 50 response times from the Weston firm produces a mean of 12.2 minutes and a standard deviation of 1.5 minutes. A sample of 50 response times from Mid-Valley produces a mean of 14.0 minutes and a standard deviation of 2.1 minutes. Use these data and good form to determine whether Weston has a faster response time than Mid-Valley. Use a 0.05 significance level.
Using traditional methods, it takes 98 hours to receive a basic driving license. A new license training method using Computer Aided Instruction (CAI) has been proposed. A researcher used the technique with 270 students and observed that they had a mean of 97 hours. Assume the standard deviation is known to be 7. A level of significance of 0.1 will be used to determine if the technique performs differently than the traditional method. Is there sufficient evidence to support the claim that the technique performs differently than the traditional method? What is the conclusion?
An appliance manufacturer claims to have developed a compact microwave oven that consumes a mean of no more than 250 W. From previous studies, it is believed that power consumption for microwave ovens is normally distributed with a population standard deviation of 15 W. A consumer group has decided to try to discover if the claim appears true. They take a sample of 20 microwave ovens and find that they consume a mean of 257.3 W. The value of the test statistic is ________. Question 20 options: 1) 2.18 2) 9.73 3) -9.73 4) -2.18