A used car dealer says that the mean price of a three-year-old sports utility vehicle is $24,000. You suspect this claim is incorrect and find that a random sample of 24 similar vehicles has a mean price of $24 521 and a standarddeviation of $1913. Is there enough evidence to reject the claim at a=0.05? Complete parts (a) through (e) below. Assume the population is normally distributed....(c) Find the standardized test statistic t.t= 1.33 (Round to two decimal places as needed.)(d) Decide whether to reject or fail to reject the null hypothesis.O A. Fail to reject Ho because the test statistic is in the rejection region(s).O B. Reject Ho because the test statistic is in the rejection region(s).Q C. Fail to reject Ho because the test statistic is not in the rejection region(s).O D. Reject Ho because the test statistic is not in the rejection region(s).(e) Interpret the decision in the context of the original claim.O A. At the 5% level of significance, there is sufficient evidence to reject the claim that the mean price is not $24,000.O B. At the 5% level of significance, there is not sufficient evidence to reject the claim that the mean price is not $24,000.O C. At the 5% level of significance, there is not sufficient evidence to reject the claim that the mean price is $24,000.O D. At the 5% level of significance, there is sufficient evidence to reject the claim that the mean price is $24,000.NextTextbookCalculator7:58 PM64°F12/6/2021T23Type here to search(99+10/05/17DO521 AUF5PrtScInsertDeleteFOF8F9F12F10FIT6BackspaceNumLockETYHomeS.GH.JKLEnterB+IIV.* COMLLI

From the given information, μ=24000n=24x¯=24521s=1913 Test statistic: t=x¯-μsn =24521-24000191324…

Answered: Aused car dealer says that the mean…

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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Español A coin-operated drink machine was designed to discharge a mean of 7 fluid ounces of coffee per cup. In a test of the machine, the discharge amounts in 14 randomly chosen cups of coffee from the machine were recorded. The sample mean and sample standard deviation were 7.08 fluid ounces and 0.25 fluid ounces, respectively. If we assume that the discharge amounts are approximately normally distributed, is there enough evidence, to conclude that the population mean discharge, u, differs from 7 fluid ounces? Use the 0.10 level of significance. Perform a two-tailed test. Then complete the parts below. Carry your intermediate computations to three or more decimal places. (If necessary, consult a list of formulas.) (a) State the null hypothesis H, and the alternative hypothesis H. Ho :0 H :0 (b) Determine the type of test statistic to use. O=0 OSO (Choose one) (c) Find the value of the test statistic. (Round to three or more decimal places.) O
The mean score on a driving exam for a group of driver’s education students is 76 points, with a standard deviation of 6 points. Apply chebychev’s theorem to the data using K=2. Interpret, At least ___% of the exam score falls between ___and ____
This assignment is worth 1 points. The extra point will be added to your overall course grade. For example: if you receive an 88% in the course you can receive up to 1 point giving you a new score of 89%. The following rubric will be used. 0.25 point for drawing the normal distribution curve with the mean value labeled on the curve and the appropriate area shaded. 0.25 point for determining the value of the standard deviation of the sample mean. 0.5 point for finding the correct probability. All work must be shown in order to receive any credit. Please upload your completed assignment here. The length of time taken on the SAT for a group of students is normally distributed with a mean of 2.5 hours and a standard deviation of 0.25 hours. A sample size of n = 60 is drawn randomly from the population. Find the probability that the sample mean is between two hours and three hours.
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.)
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A math teacher claims that she has developed a review course that increases the scores of students on the math portion of a college entrance exam. Based on data from the administrator of the exam, scores are normally distributed with p=511. The teacher obtains a random sample of 2000 students, puts them through the review class, and finds that the mean math score of the 2000 students is 519 with a standard deviation of 117. Complete parts (a) through (d) below. (a) State the null and alternative hypotheses. Let u be the mean score. Choose the correct answer below. O A. Ho =511, H, >511 OB. Ho H511 OC. Ho u>511, H, u511 OD. Ho =511, H, u511 (b) Test the hypothesis at the a=0.10 level of significance. Is a mean math score of 519 statistically significantly higher than 511? Conduct a hypothesis test using the P-value approach. Find the test statistic (Round to two decimal places as needed) Find the P-value The P-value is (Round to three decimal places as needed) Is the sample mean…

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