A used car dealer says that the mean price of a three-year-old sports utility vehicle is $21,000. You suspect this claim is incorrect and find that a random sample of 20 similar vehicles has a mean price of $21,835 and a standard deviation of $1954. Is there enough evidence to reject the claim at a = 0.01? Complete parts (a) through (e) below. Assume the population is normally distributed. (a) Write the claim mathematically and identify Ho and Ha. Which of the following correctly states Ho and Ha? O A. Ho: H> $21,000 Ha: us $21,000 O B. Ho: H = $21,000 Ha:H<$21,000 O C. Ho: u# $21,000 Ha: H= $21,000 O D. Ho: H= $21,000 YE H : μ= S21,000 ΟΕ Ho: μ2 $21,000 Ha:H< $21,000 Ha:u> $21,000 Ha: H#$21,000 (b) Find the critical value(s) and identify the rejection region(s). What is(are) the critical value(s), to? to (Use a comma to separate answers as needed. Round to three decimal places as needed.)

A used car dealer says that the mean price of a three-year-old sports utility vehicle is $21,000. You suspect this claim is incorrect and find that a random sample of 20 similar vehicles has a mean price of $21,835 and a standard deviation of $1954. Is there enough evidence to reject the claim at a = 0.01? Complete parts (a) through (e) below. Assume the population is normally distributed. (a) Write the claim mathematically and identify Ho and Ha. Which of the following correctly states Ho and Ha? O A. Ho: H> $21,000 Ha: us $21,000 O B. Ho: H = $21,000 Ha:H<$21,000 O C. Ho: u# $21,000 Ha: H= $21,000 O D. Ho: H= $21,000 YE H : μ= S21,000 ΟΕ Ho: μ2 $21,000 Ha:H< $21,000 Ha:u> $21,000 Ha: H#$21,000 (b) Find the critical value(s) and identify the rejection region(s). What is(are) the critical value(s), to? to (Use a comma to separate answers as needed. Round to three decimal places as needed.)

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Description: A used car dealer says that the mean price of a three-year-old sports utility vehicle is $21,000. You suspect this claim is incorrect and find that a random sample of 20similar vehicles has a mean price of $21,835 and a standard deviation of $1954.

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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A used car dealer says that the mean price of a three-year-old sports utility vehicle is $23,000. You suspect this claim is incorrect and find that a random sample of 21 similar vehidles has a mean price of $23,626 and a standard deviation of $1978. Is there enough evidence to reject the claim at a = 0.01? Complete parts (a) through (e) below. Assume the population is normally distributed. (a) Write the claim mathematically and identify Ho and H Which of the following correctly states Ho and H,? O A. Ho: u#$23,000 H:= $23,000 O B. Ho: = $23,000 C. Hạ: u= $23,000 Hu $23,000 H us $23,000 OF. Ho: u= $23,000 Hu> $23,000 Hu< $23,000 (b) Find the critical value(s) and identify the rejection region(s). What is(are) the critical value(s), to? (Use a comma to separate answers as needed. Round to three decimal places as needed.)
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A used car dealer says that the mean price of a three-year-old sports utility vehicle is $21,000. You suspect this claim is incorrect and find that a random sample of 24 similar vehicles has a mean price of $21,719 and a standard deviation of $1996. Is there enough evidence to reject the claim at a = 0.01? Complete parts (a) through (e) below. Assume the population is normally distributed. e (a) Write the claim mathematically and identify Ho and Ha. E1 Which of the following correctly states Ho and H,? O A. Ho: u> $21,000 H3: us$21,000 O B. Ho: H= $21,000 OC. Ho: u#$21,000 Ha:u $21,000 O E. Ho:H= $21,000 Ha: u#$21,000 OF. Ho: u2$21,000 H:u O B. t O D.
A credit card company claims that the mean credit card debt for individuals is greater than $5,300. You want to test this claim. You find that a random sample of 36 cardholders has a mean credit card balance of $5,491 and a standard deviation of $550. At a= 0.01, can you support the claim? Complete parts (a) through (e) below. Assume the population is normally distributed. (a) Write the claim mathematically and identify Ho and Ha. Which of the following correctly states Ho and H,? O B. Ho: µs $5,300 O A. Ho: µ> S5,300 H3: us $5,300 O C. H: μ > $5,300 H3: us $5,300 H3: u> $5,300 OF Ho: μ = 55,300 Ha: u# 55,300 Ο D . Ho: μ2 55,300 O E. Ho: µ= $5,300 Ha: µ $5,300 (b) Find the critical value(s) and identify the rejection region(s). What is(are) the critical value(s), to? to =0 (Use a comma to separate answers as needed. Round to three decimal places as needed.) Determine the rejection region(s). Select the correct choice below and fill in the answer box(es) within your choice. (Round to…
A credit card company claims that the mean credit card debt for individuals is greater than $5,300. You want to test this claim. You find that a random sample of 30 cardholders has a mean credit card balance of $5,400 and a standard deviation of $625. At a = 0.05, can you support the claim? Complete parts (a) through (e) below. Assume the population is normally distributed. (a) Write the claim mathematically and identify Ho and Ha. Which of the following correctly states H, and H, ? O A. Ho: H2 $5,300 О В. Н: и> $5,300 О с. Но: и- $5,300 Ha: µ $5,300 O D. Ho: µ> $5,300 ОЕ. Но: и3 $5,300 OF. Ho: Hs $5,300 Ha: us $5,300 Ha: H# $5,300 Ha: u> $5,300 (b) Find the critical value(s) and identify the rejection region(s). What is(are) the critical value(s), to? to =0 (Use a comma to separate answers as needed. Round to three decimal places as needed.) Determine the rejection region(s). Select the correct choice below and fill in the answer box(es) within your choice. (Round to three decimal…
A credit card company claims that the mean credit card debt for individuals is greater than $5,200. You want to test this claim. You find that a random sample of 34 cardholders has a mean credit card balance of $5,414 and a standard deviation of $675. At a = 0.10, can you support the claim? Complete parts (a) through (e) below. Assume the population is normally distributed. (a) Write the claim mathematically and identify Ho and H. Which of the following correctly states Ho and H, ? c. Hạ: us$5,200 H p> $5,200 O B. Ho: = $5,200 H, u$5,200 O E. Ho: u= $5,200 H u> $5,200 O A. Ho: u> $5,200 H us$5,200 O D. Ho: u2 $5,200 Hu $5,200 H:us$5,200 (b) Find the critical value(s) and identify the rejection region(s). What is(are) the critical value(s), to? 6 = 1.308 (Use comma to separate answers as needed. Round to three decimal places as needed.) Determine the rejection region(s). Select the correct choice below and fill in the answer box(es) within your choice. (Round to three decimal places as…
A credit card company claims that the mean credit card debt for individuals is greater than $5,200. You want to test this claim. You find that a random sample of 34 cardholders has a mean credit card balance of $5,414 and a standard deviation of $675. At a = 0.10, can you support the claim? Complete parts (a) through (e) below. Assume the population is normally distributed. (a) Write the claim mathematically and identify Ho and Ha- Which of the following correctly states Ho and H,? O A. Ho: u> $5,200 H:us$5,200 O B. Ho: u= $5,200 Hu#$5,200 C. Hạ: us $5,200 Hu> $5,200 O D. Ho: u2 $5,200 Hu $5,200 OF. Ho: > $5,200 Hi uS$5,200 (b) Find the critical value(s) and identify the rejection region(s). What is(are) the critical value(s), to? (Use a comma to separate answers as needed. Round to three decimal places as needed.)
A used car dealer says that the mean price of a three-year-old sports utility vehicle is $21,000. You suspect this claim is incorrect and find that a random sample of 21 similar vehicles has a mean price of $21,848 and a standarc deviation of $1985. Is there enough evidence to reject the claim at a = 0.05? Complete parts (a) through (e) below. Assume the population is normally distributed. (a) Write the claim mathematically and identify Ho and Ha. Which of the following correctly states Ho and H2? O A. Ho: =$21,000 B. Ho: H= $21,000 Ha: H#$21,000 OC. Ho: H > $21,000 Hgius $21,000 HaiH>$21,000 OD. Ho: H#$21,000 HaiH=$21,000 E. Ho:H= $21,000 Ha: H O C. t D. t< (c) Find the standardized test statistic t. t= (Round to two decimal places as needed.)
A credit card company claims that the mean credit card debt for individuals is greater than $5,100. You want to test this claim. You find that a random sample of 36 cardholders has a mean credit card balance of $5,271 and a standard deviation of $650. At a = 0.05, can you support the claim? Complete parts (a) through (e) below. Assume the population is normally distributed. (a) Write the claim mathematically and identify H, and Ha. Which of the following correctly states H, and H,? Ho: µs $5,100 Ha: µ> $5,100 B. Ho: µ> $5,100 Ha: us $5,100 C. Ho: µ= $5,100 Ha: u# $5,100 Ho:µ= $5,100 Hai µ > $5,100 O E. Ho: µ2 $5,100 Ha: u $5,100 Hạ: us $5,100 (b) Find the critical value(s) and identify the rejection region(s). What is(are) the critical value(s), to? to = = 1.690 (Use a comma to separate answers as needed. Round to three decimal places as needed.) Determine the rejection region(s). Select the correct choice below and fill in the answer box(es) within your choice. (Round to three decimal…
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The manager of a Kroger grocery store claims a membership card will save consumers more than $15 per week on average. To check this claim, a random sample of 12 shoppers with membership cards was obtained and their weekly grocery bills were inspected. Suppose the sample mean was $16.35 and the sample standard deviation was $3.20. Assume the distribution of savings is normal. a. Check the necessary assumptions and conditions for doing this test. b. What are the appropriate hypotheses to test the claim? c. Calculate the appropriate test statistic and p-value. d. What is the conclusion?