What hypothesis testing procedure should you use to answer these questions?Assume all samples are simple random samples, and assume x = 0.05 if it isn'tspecified.A car company says that the mean gas mileage for its luxury sedan is at least 21 mpg.You believe the claim is incorrect and find that a random sample of 5 cars has a meangas mileage of 19 mpg and a sample standard deviation of 4 mpg. Assume the gasmileage of all of the company's luxury sedans is normally distributed. At x = 0.05,test the company's claim.One sample z-test for the population mean.Two sample z-test for the population means.One sample z-test for proportions.Two sample z-test for proportions.One sample t-test for the population mean.None of our hypothesis tests fit.20

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Answered: What hypothesis testing procedure…

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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You are testing the claim that the mean GPA of night students is different than the mean GPA of day students.You sample 35 night students, and the sample mean GPA is 2.78 with a standard deviation of 0.79You sample 25 day students, and the sample mean GPA is 3.11 with a standard deviation of 0.68Calculate the test statistic, rounded to 2 decimal places
You are testing the claim that the mean GPA of night students is different from the mean GPA of day students. You sample 35 night students, and the sample mean GPA is 2.68 with a standard deviation of 0.75. You sample 55 day students, and the sample mean GPA is 2.45 with a standard deviation of 0.49. Test the claim using a 5% level of significance. Assume the population standard deviations are unequal and that GPAs are normally distributed. Give answer to at least 4 decimal places. What are the correct hypotheses? Ho: Select an answer = Select an answer H₁: Select an answer ? Select an answer Based on the hypotheses, find the following: Test Statistic = Critical Values = ± (Just enter the positive CV.) The correct decision is to Select an answer The correct summary would be: [Select an answer night students is different from the mean GPA of day students. that the mean GPA of
You sample 55 night students, and the sample mean GPA is 2.14 with a standard deviation of 0.82 You sample 25 day students, and the sample mean GPA is 2.01 with a standard deviation of 0.92 Calculate the test statistic, rounded to 2 decimal places
You are testing the claim that the mean GPA of night students is greater than the mean GPA of day students.You sample 55 night students, and the sample mean GPA is 2.85 with a standard deviation of 0.94You sample 50 day students, and the sample mean GPA is 3.05 with a standard deviation of 0.6Calculate the test statistic, rounded to 2 decimal places
You are testing the claim that the mean GPA of night students is different from the mean GPA of day students. You sample 60 night students, and the sample mean GPA is 2.16 with a standard deviation of 0.79. You sample 20 day students, and the sample mean GPA is 2.09 with a standard deviation of 0.93. Test the claim using a 1% level of significance. Assume the population standard deviations are unequal and that GPAs are normally distributed. Give answer to at least 4 decimal places. What are the correct hypotheses? Ho: ₁ H₁: M₁ Test Statistic = Critical Values Based on the hypotheses, find the following: = = H₁₂ ± #v OF H₂ (Just enter the positive CV.) The correct decision is to Fail to reject the null hypothesis The correct summary would be: There is not enough evidence to support the claim ✓ of night students is different from the mean GPA of day students. o that the mean GPA
Consider a value to be significantly low if its z score less than or equal to - 2 or consider a value to be significantly high if its z score is greater than or equal to 2. Atest is used to assess readiness for college. In a recent year, the mean test score was 21.3 and the standard deviation was 4.7. Identify the test scores that are significantly low or significantly high. What test scores are significantly low? Select the correct answer below and fill in the answer box(es) to complete your choice. O A. Test scores that are greater than (Round to one decimal place as needed.) O B. Test scores that are between and (Round to one decimal place as needed. Use ascending order.) OC Test scores that are less than (Round to one decimal place as needed.)
The mean is 146 and the standard deviation is 35. A score of 41 is how many z-scores below the mean?
You are testing the claim that the mean GPA of night students is different than the mean GPA of day students.You sample 30 night students, and the sample mean GPA is 2.34 with a standard deviation of 0.6You sample 40 day students, and the sample mean GPA is 2.42 with a standard deviation of 0.67Calculate the test statistic, rounded to 2 decimal places
just the multiple choice question
Consider a value to be significantly low if its z score less than or equal to -2 or consider a value to be significantly high if its z score is greater than or equal to 2. A test is used to assess readiness for college. In a recent year, the mean test score was 19.2 and the standard deviation was 4.5. Identify the test scores that are significantly low or significantly high. What test scores are significantly low? Select the correct answer below and fill in the answer box(es) to complete your choice. A. Test scores that are greater than_____(Round to one decimal place as needed.) B. Test scores that are less than____(Round to one decimal place as needed.) C. Test scores that are between_______ and _____(Round to one decimal place as needed. Use ascending order.)
Consider a value to be significantly low if its z score less than or equal to −2 or consider a value to be significantly high if its z score is greater than or equal to 2. A test is used to assess readiness for college. In a recent year, the mean test score was 21.4 and the standard deviation was 5.4. Identify the test scores that are significantly low or significantly high. What test scores are significantly low? Select the correct answer below and fill in the answer box(es) to complete your choice. A. Test scores that are between ____ and _____. (Round to one decimal place as needed. Use ascending order.) B. Test scores that are less than _____. (Round to one decimal place as needed.) C. Test scores that are greater than _____. (Round to one decimal place as needed.)
You are testing the claim that the mean GPA of night students is different from the mean GPA of day students. You sample 20 night students, and the sample mean GPA is 2.85 with a standard deviation of 0.86. You sample 30 day students, and the sample mean GPA is 3.02 with a standard deviation of 0.4. Test the claim using a 5% level of significance. Assume the population standard deviations are unequal and that GPAs are normally distributed. Give answer to at least 4 decimal places. What are the correct hypotheses?H0: = H1: Based on the hypotheses, find the following:Test Statistic = p− value = The correct decision is to The correct summary would be: that the mean GPA of night students is different from the mean GPA of day students.

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