According to a magazine, people read an average of more than two books in a month. A survey of 20 random individuals found that the mean number of books theyread was 19 with a standard deviation of 1.26.a. To test the magazine's claim, what should the appropriate hypotheses be?b. Compute the test statistic.c. Using a level of significance of 0.05, what is the critical value?d. Find the p-value for the test.e. What is your conclusion?a. To test the magazine's claim, what should the appropriate hypotheses be?Determine the null hypothesis, H, and the alternative hypothesis, H,.H,(Type whole numbers.)口口

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Answered: According to a magazine, people read an…

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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An exam score has a mean of 78 and a standard deviation of 9. What is the z-score for an exam score of 64.5? What is the z-score for an exam score of 82.5? Which exam score is more unsual, 64.5 or 82.5? O An exam score of 64.5 is more unsual because its corresponding z-score is further from 0. O An exam score of 82.5 is more unusual because its corresponding z-score is further from 0.
The average salary in this city is $46,700. Is the average different for single people? 53 randomly selected single people who were surveyed had an average salary of $48,860 and a standard deviation of $9,210. What can be concluded at the a = 0.05 level of significance? a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Ho: ? v Select an answer v H1: Select an er v answe c. The test statistic ? (please show your answer to 3 decimal places.) d. The p-value = e. The p-value is ? va f. Based on this, we should Select an answer v the null hypothesis. (Please show your answer to 4 decimal places.) g. Thus, the final conclusion is that .. O The data suggest that the sample mean is not significantly different from 46,700 at a = 0.05, so there is statistically insignificant evidence to conclude that the sample mean salary for singles is different from 48,860. O The data suggest that the population mean is not significantly different from 46,700…
The average American consumes 89 liters of alcohol per year. Does the average college student consume less alcohol per year? A researcher surveyed 15 randomly selected college students and found that they averaged 87.3 liters of alcohol consumed per year with a standard deviation of 15 liters. What can be concluded at the the a = 0.05 level of significance? a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Но: ? Select an answer V Н: ? v Select an answer V c. The test statistic ? v = (please show your answer to 3 decimal places.) d. The p-value = (Please show your answer to 4 decimal places.) e. The p-value is ? v a f. Based on this, we should Select an answer g. Thus, the final conclusion is that ... the null hypothesis. O The data suggest the population mean is not significantly less than 89 at a = 0.05, so there is statistically insignificant evidence to conclude that the population mean amount of alcohol consumed by college students…
Is sea level the same along all coastal regions? To examine this a sample of 12 coastal locations in the Gulf Coast had mean sea level 5.3953m and standard deviation 2.2559m. A sample of 17 locations along the eastern seaboard had a mean 3.4028m and a standard deviation of 1.036m. a. What is the point estimate for the difference in mean sea level? b. What is the standard error of the difference in means? c. What is the margin of error for a 99% confidence interval? d. Construct and interpret the confidence interval for the difference in mean sea level between the Gulf Coast and the eastern seaboard.
The average number of accidents at controlled intersections per year is 5.6. Is this average a different number for intersections with cameras installed? The 67 randomly observed intersections with cameras installed had an average of 5.8 accidents per year and the standard deviation was 0.6. 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: ? v Select an answer v H1: ? v Select an answer V c. The test statistic ? V = (please show your answer to 3 decimal places.) d. The p-value = (Please show your answer to 4 decimal places.) e. The p-value is ? va f. Based on this, we should Select an answer g. Thus, the final conclusion is that ... the null hypothesis. The data suggest that the population mean is not significantly different from 5.6 at a = 0.01, so there is statistically insignificant evidence to conclude that the population mean number of accidents per year at…
The president of a college wants to determine the mean number of units that college students take per semester. How large of a sample is required in order to be 99% sure that a sample mean will be off by no more than 1.25 units? An initial study suggested that the standard deviation is approximately 2.1 units.
In a certain city, the average 20- to 29-year old man is 69.8 inches tall, with a standard deviation of 3.0 inches, while the average 20- to 29-year old woman is 64.3 inches tall, with a standard deviation of 3.9 inches Who is relatively taller e 75-inch man or a 70-inch woman? Find the corresponding z-scores. Who is relatively taller, a 75-inch man or a 70-inch woman? Select the correct choice below and fill in the answer boxes to complete vour choice (Round to two decimal places as needed.) O A. The z-score for the man, is smaller than the z-score for the woman, so he is relatively taller. O B. The z-score for the man, is larger than the z-score for the woman, so he is relatively taller. O C. The z-score for the woman, is smaller than the z-score for the man, so she is relatively taller. O D. The z-score for the woman, is larger than the z-score for the man. so she is relatively taller.
A previous study found that the students' scores in a national examination in 2020 are normally distributed with mean 74 and standard deviation 3.5. a. What percentage of students got a score of at least 80? b. Given the total number of examinees is 2500, how many got a score of at least 80?
The average height of 50 male students who were athletes was 173 cm with standard deviation of 6.5 cm. Other 50 male students who are non-athletes has an average height of 171 cm with a standard deviation of 7 cm. Using one-tailed test: a. What should be the hypotheses? b. What is the t-value/z-value? c. Are male students who are athletes taller than those who are non-athletes?
The mean number of eggs per person eaten in the United States is 242. Do college students eat more eggs than the average American? The 57 college students surveyed averaged 252 eggs per person and their standard deviation was 26.2. 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: H₁: Select an answer Select an answer c. The test statistic ? ✓ d. The p-value = e. The p-value is ? ✓ a f. Based on this, we should g. Thus, the final conclusion is that ... (please show your answer to 3 decimal places.) (Please show your answer to 4 decimal places.) Select an answer the null hypothesis. O The data suggest that the sample mean is not significantly more than 242 at a = 0.01, so there is statistically insignificant evidence to conclude that the sample mean number of eggs consumed by college students per year is more than 252. The data suggest that the populaton mean is…
The average cost of tuition, room and board at small private liberal arts colleges is reported to be $8,500 per term, but a financial administrator believes that the average cost is higher. A study conducted using 350 small liberal arts colleges showed that the average cost per term is $8,745 with a standard deviation of $1,200. Let = 0.05., what is our decision about the average cost? Select one: a.Less than $8,500 b.Greater than 8500 c.None is correct d.Not equal to $8,500 e.Equal to $8,500
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