Question

1. The US Department of Energy reported that 52% of homes in the USA were heated...

1.

The US Department of Energy reported that 52% of homes in the USA were heated by natural gas. A random sample of 316 homes in Oregon found that 152 were heated by natural gas. Test the claim that proportion of homes in Oregon that were heated by natural gas is different from the US reported proportion. Use a 5% significance level. Give answers accurate to at least 3 decimal places.

What are the correct hypotheses? (Select the correct symbols and use decimal values not percentages.)

H0:



H1:

Based on the hypotheses, find the following:

Test Statistic =

p-value =

Based on the above we choose to

The correct summary would be:

that the percent of homes in Oregon heated by natural gas is different than 52%.

2,

The US Department of Energy reported that 49% of homes were heated by natural gas. A random sample of 325 homes in Oregon found that 140 were heated by natural gas. Test the claim that proportion of homes in Oregon that were heated by natural gas is different than what was reported. Use a 10% significance level. Give answer to at least 4 decimal places.

What are the correct hypotheses? (Select the correct symbols and use decimal values not percentages.)

H0:



H1:

Based on the hypotheses, find the following:

Test Statistic =

p-value =

Based on the above we choose to

The correct summary would be: that the proportion of homes in Oregon that were heated by natural gas is different than what the DOE reported value of 49%.

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
The US Department of Energy reported that 45% of homes were heated by natural gas. A...
The US Department of Energy reported that 45% of homes were heated by natural gas. A random sample of 300 homes in Oregon found that 170 were heated by natural gas. Test the claim that proportion of homes in Oregon that were heated by natural gas is different than what was reported. Use a 5% significance level. Give answer to at least 4 decimal places. What are the correct hypotheses? (Select the correct symbols and use decimal values not percentages.)...
The US Department of Energy reported that 46% of homes were heated by natural gas. A...
The US Department of Energy reported that 46% of homes were heated by natural gas. A random sample of 300 homes in Oregon found that 138 were heated by natural gas. Test the claim that proportion of homes in Oregon that were heated by natural gas is different than what was reported. Use a 1% significance level. Give answer to at least 4 decimal places. What are the correct hypotheses? (Select the correct symbols and use decimal values not percentages.)...
The work week for adults in the US that work full time is normally distributed with...
The work week for adults in the US that work full time is normally distributed with a mean of 47 hours. A newly hired engineer at a start-up company believes that employees at start-up companies work more on average then most working adults in the US. She asks 12 engineering friends at start-ups for the lengths in hours of their work week. Their responses are shown in the table below. Test the claim using a 10% level of significance. Give...
This problem has 6 parts. This is part 1 of 6. A car magazine makes the...
This problem has 6 parts. This is part 1 of 6. A car magazine makes the claim, "On average, there is no difference in gas mileage between automatic and manual transmission cars." The gas mileage in miles per gallon (mpg) for 30 different cars was recorded for both types of transmissions. A summary of the data is given below. Using this summary data, test the car magazine's claim using a significance level of 0.05. 1. Select the pair of hypotheses...
You are conducting a study to see if the proportion of men over the age of...
You are conducting a study to see if the proportion of men over the age of 50 who regularly have their prostate examined is significantly less than 0.31. A random sample of 704 men over the age of 50 found that 201 have their prostate regularly examined. Do the sample data provide convincing evidence to support the claim? Test the relevant hypotheses using a 5% level of significance. Give answer to at least 4 decimal places. What are the correct...
he work week for adults in the US that work full time is normally distributed with...
he work week for adults in the US that work full time is normally distributed with a mean of 47 hours. A newly hired engineer at a start-up company believes that employees at start-up companies work more on average then most working adults in the US. She asks 12 engineering friends at start-ups for the lengths in hours of their work week. Their responses are shown in the table below. Test the claim using a 10% level of significance. Give...
USA Today reported that about 47% of the general consumer population in the United States is...
USA Today reported that about 47% of the general consumer population in the United States is loyal to the automobile manufacturer of their choice. Suppose Chevrolet did a study of a random sample of 1003 Chevrolet owners and found that 486 said they would buy another Chevrolet. Does this indicate that the population proportion of consumers loyal to Chevrolet is more than 47%? Use α = 0.01. (a) What is the level of significance? State the null and alternate hypotheses....
Assume that adults were randomly selected for a poll. They were asked if they "favor or...
Assume that adults were randomly selected for a poll. They were asked if they "favor or oppose using federal tax dollars to fund medical research using stem cells obtained from human embryos." Of those polled, 486 were in favor, 397 were opposed, and 118 were unsure. A politician claims that people don't really understand the stem cell issue and their responses to such questions are random responses equivalent to a coin toss. Exclude the 118 subjects who said that they...
The U.S. Department of Transportation, National Highway Traffic Safety Administration, reported that 77% of all fatally...
The U.S. Department of Transportation, National Highway Traffic Safety Administration, reported that 77% of all fatally injured automobile drivers were intoxicated. A random sample of 52 records of automobile driver fatalities in a certain county showed that 34 involved an intoxicated driver. Do these data indicate that the population proportion of driver fatalities related to alcohol is less than 77% in Kit Carson County? Use α = 0.10. (a) What is the level of significance? Answer: 0.10 State the null...
1. According to a University Center for Logistics Management, 10% of all merchandise sold in the...
1. According to a University Center for Logistics Management, 10% of all merchandise sold in the United States gets returned. A Seattle department store sampled 90 items sold in January and found that 10 of the items were returned. If you have the following null and alternative hypotheses for a test you are running: H0:p=0.1 Ha:p<0.1 Calculate the test statistic, rounded to 3 decimal places 2. Suppose you are testing the following claim: "Less than 72% of people support legalizing...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT