Question

In the year 2000, the average car had a fuel economy of 21.1 MPG. You are curious as to whether the average in the present da

0 0
Add a comment Improve this question Transcribed image text
Answer #1

solution:

present day is greater than the historical value

This is the right  tailed test .

The null and alternative hypothesis is ,

H0 :  \mu\leq 21.1

Ha : \mu > 21.1

Add a comment
Know the answer?
Add Answer to:
In the year 2000, the average car had a fuel economy of 21.1 MPG. You are...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions
  • In the year 2000, the average vehicle had a fuel economy of 24.09 MPG. You are...

    In the year 2000, the average vehicle had a fuel economy of 24.09 MPG. You are curious as to whether the average in the present day is greater than the historical value. The hypotheses for this scenario are as follows: Null Hypothesis: μ ≤ 24.09, Alternative Hypothesis: μ > 24.09. A random sample of 34 vehicles shows an average economy of 24.24 MPG with a standard deviation of 3.185 MPG. What is the test statistic and p-value for this test?...

  • In the year 2000, the average car had a fuel economy of 23.2 MPG. You are...

    In the year 2000, the average car had a fuel economy of 23.2 MPG. You are curious as to whether the average in the present day is less than the historical value. The hypotheses for this scenario are as follows: Null Hypothesis: μ ≥ 23.2, Alternative Hypothesis: μ < 23.2. If the true average fuel economy today is 38 MPG and the null hypothesis is not rejected, did a type I, type II, or no error occur? Question 13 options:...

  • The average fuel economy of a sample of 79 Japanese cars was 30.5 mpg with a standard deviation 6.1 mpg. Do these data...

    The average fuel economy of a sample of 79 Japanese cars was 30.5 mpg with a standard deviation 6.1 mpg. Do these data present evidence that the average fuel economy of all Japanese cars is higher than the corresponding US average of 20.1 mpg? Report and appropriate hypothesis test, write out all the steps we went over in class, and use a 1% significance level |(1) We are testing [Select] (2) Ho: The average fuel economy [Select [Select] (3) Ha:...

  • Hello, I need some help with the second question? Thank you! The owner of a health...

    Hello, I need some help with the second question? Thank you! The owner of a health club franchise believes that the average age of the club's members is under 45 years. To test this, a random sample of 30 members was selected. The accompanying sample data are the ages of the sampled individuals. Click the icon to view the data table. a. State the appropriate null and alternative hypotheses. b. Use the test statistic approach to test the null hypothesis...

  • Suppose the national average dollar amount for an automobile insurance claim is $711.59. You work for...

    Suppose the national average dollar amount for an automobile insurance claim is $711.59. You work for an agency in Michigan and you are interested in whether or not the state average is different from the national average. Treating the national mean as the historical value, What are the appropriate hypotheses for this test? 1) HO: μ = 711.59 HA: μ ≠ 711.59 2) HO: μ > 711.59 HA: μ ≤ 711.59 3) HO: μ ≥ 711.59 HA: μ < 711.59...

  • The fuel economy sticker on a new SUV’s window sticker indicates the owner can expect 16...

    The fuel economy sticker on a new SUV’s window sticker indicates the owner can expect 16 mpg in city driving and 20 mpg highway driving and 18 mpg overall. Accurate gasoline records for one such vehicle were kept, and a random sample of mileage per tank of gasoline was collected: 17.6 17.7 18.1 22.0 17.0 19.4 18.9 17.4 21.0 19.2 18.3 19.1 20.7 16.7 19.4 18.2 18.4 17.1 17.4 15.8 17.9 18.0 16.3 17.5 17.3 20.4 19.1 21.0 18.1 19.0...

  • anufacturer claims that your new car gets 32 mpg on the highway. You suspect that the...

    anufacturer claims that your new car gets 32 mpg on the highway. You suspect that the mpg is a different number for your car. The 52 trips on the highway that you took averaged 26.9 mpg and the standard deviation for these 52 trips was 12.6 mpg. What can be concluded at the a = 0.01 level of significance? a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: HO: ? Select...

  • The P-value for a hypothesis test is shown. Use the P-value to decide whether to reject...

    The P-value for a hypothesis test is shown. Use the P-value to decide whether to reject He when the level of significance is (a) a = 0.01, (b) a = 0.05, and (C) a = 0.10. P = 0.0695 (a) Do you reject or fail to reject He at the 0.01 level of significance? O A. Fail to reject H, because the P-value, 0.0695, is greater than a = 0.01. O B. Fail to reject H, because the P-value, 0.0695,...

  • It is reported in USA Today that the average flight cost nationwide is $458.78. You have...

    It is reported in USA Today that the average flight cost nationwide is $458.78. You have never paid close to that amount and you want to perform a hypothesis test that the true average is actually less than $458.78. The hypotheses for this situation are as follows: Null Hypothesis: μ ≥ 458.78, Alternative Hypothesis: μ < 458.78. You take a random sample of national flight cost information and perform a one sample mean hypothesis test. You observe a p-value of...

  • Consumers Energy states that the average electric bill across the state is $123.29. You want to...

    Consumers Energy states that the average electric bill across the state is $123.29. You want to test the claim that the average bill amount is actually different from $123.29. The hypotheses for this situation are as follows: Null Hypothesis: μ = 123.29, Alternative Hypothesis: μ ≠ 123.29. You complete a randomized survey throughout the state and perform a one-sample hypothesis test for the mean, which results in a p-value of 0.3178. What is the appropriate conclusion? Conclude at the 5%...

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT