Question

A tax preparation firm claims that the average savings from their tax review is more than...

A tax preparation firm claims that the average savings from their tax review is more than $2,500. if we wish to evaluate this claim through hypothesis testing the proper hypothesis statement is

H0: u(=,>,<,>=,<=, not =) 2500

H1: u(=,>,<,>=,<=, not =) 2500

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

solution :

this is the right tailed test .  

The null and alternative hypothesis is ,

H0 :   = 2500

Ha : >  2500

Add a comment
Know the answer?
Add Answer to:
A tax preparation firm claims that the average savings from their tax review is more than...
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
  • GreenBeam Ltd. claims that its compact fluorescent bulbs average no more than 3.45 mg of mercury....

    GreenBeam Ltd. claims that its compact fluorescent bulbs average no more than 3.45 mg of mercury. A sample of 55 bulbs shows a mean of 3.57 mg of mercury. (a) State the hypotheses for a right-tailed test, using GreenBeam’s claim as the null hypothesis about the mean. H0: μ ≤ 3.45 mg vs. H1: μ > 3.45 mg (b) Assuming a known standard deviation of 0.26 mg, calculate the z test statistic to test the manufacturer’s claim. (Round your answer...

  • Spam: Larry claims that more than a quarter of all his email is spam. In a...

    Spam: Larry claims that more than a quarter of all his email is spam. In a random sample of 80 of his emails, 26 of them are spam. Test his claim at the 0.05 significance level. (a) What is the sample proportion of spam in his email? Round your answer to 3 decimal places. p̂ =   (b) What is the test statistic? Round your answer to 2 decimal places. z =   (c) What is the P-value of the test statistic?...

  • The owner of a local soccer team claims that average attendance at games is more than...

    The owner of a local soccer team claims that average attendance at games is more than 200. Assuming that a hypothesis test of the claim has been conducted and that the conclusion is to fail to reject the null hypothesis, state the conclusion in non-technical terms. A) There is sufficient evidence to support the claim that the mean attendance is at most 200. B) There is not sufficient evidence to support the claim that the mean attendance is at most...

  • A manufacturer of light bulbs advertises that, on average, its long-life bulb will last more than...

    A manufacturer of light bulbs advertises that, on average, its long-life bulb will last more than 5500hours. To test this claim, a statistician took a random sample of 90 bulbs and measured the amount of time until each bulb burned out. The mean lifetime of the sample of bulbs is 5551 hours and has a standard deviation of 420 hours. Can we conclude with 99% confidence that the claim is true? Fill in the requested information below. (a) The value...

  • Question 19 (5 points) A Type I error occurs in hypothesis testing when we Question 19...

    Question 19 (5 points) A Type I error occurs in hypothesis testing when we Question 19 options: a) reject the alternative hypothesis and the alternative hypothesis is true. b) fail to reject the null hypothesis and the null hypothesis is false. c) fail to reject the alternative hypothesis and the alternative hypothesis is false. d) reject the null hypothesis and the null hypothesis is true. Question 20 (5 points) A golfer claims that his average golf score at the course...

  • A manufacturer of calculator batteries claims that the average lifespan of her batteries is more than...

    A manufacturer of calculator batteries claims that the average lifespan of her batteries is more than 1300 hours. a. Set up the null and alternative hypothesis needed to substantiate this claim, as if you had reason to believe that this claim is not being met. b. A sample of 16 batteries is tested and it is found that the sample mean is 1280 hours and σ = 40 hours. Do a test of your null hypothesis at the 1% significance...

  • A. A supermarket claims that the average wait time at the checkout counter is less than...

    A. A supermarket claims that the average wait time at the checkout counter is less than 9 minutes. We can assume that the population is Normally distributed. Consider H0: mu >= 9 H1: mu < 9 A random sample of 50 customers yielded an average wait time of 8.2 minutes and a standard deviation of 2.5 minutes. What is the value of the test statistic (tstat or t-sub-xbar)? (Provide two decimal places)____________ B. Let Z be a standard Normal random...

  • A cereal company claims that the mean weight of the cereal in its packets is more...

    A cereal company claims that the mean weight of the cereal in its packets is more than 14 oz. The weights (in oz) of the cereal in a random sample of 8 cereal packets are listed below. You may assume the sample data comes from a population that follows a normal distribution. Using a 0.05 significance level, test the companies claim. State the null hypothesis H0. State the alternative hypothesis H1. What is the test statistic? State the alpha level....

  • 1. Hypothesis Testing - Setup: Suppose you want to test the claim that the mean volume...

    1. Hypothesis Testing - Setup: Suppose you want to test the claim that the mean volume in all 12-ounce cans of Fizzy Pop soda is equal to 12 ounces. In a sample of 120 cans, you find the sample mean is 12.2 ounces. (a) What is the claim? μ < 12 μ > 12     μ = 12 μ = 12.2 (b) What does μ represent? the proportion of all cans with a volume = 12 ounces the mean volume of...

  • 51. A doctor claims that the average woman is not more than 63 inches tall. A...

    51. A doctor claims that the average woman is not more than 63 inches tall. A biologist disagrees. A sample of 47 women has a mean of 64.1 inches and a standard deviation of 2.3 inches. State the null and alternative hypotheses necessary to test the doctor's claim. If we were to decide to reject the null hypothesis, how would we state the final conclusion? Question 2 1 pts A marketing research company needs to estimate which of two medical...

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