Do political science classes require the same amount of writing as history classes? The 40 randomly selectedpolitical science classes assigned an average of 15.9 pages of essay writing for the course. The standarddeviation for these 40 classes was 5.3 pages. The 49 randomly selected history classes assigned an averageof 13.8 pages of essay writing for the course. The standard deviation for these 49 classes was 5 pages. Whatcan be concluded at the a = 0.05 level of significance?For this study, we should use z-test for the difference between two population proportionsSelect an answera. The null and alternativ t-test for the difference between two independent population meansz-test for a population proportionz-test for the difference between two population proportionst-test for a population meant-test for the difference between two dependent population meansНо: и1

The z test is used when the sample sizes are large i.e., more than 30 and the population standard…

Answered: Do political science classes require…

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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The manager of a major retail store has taken a random sample of 25 customers. The average sale was $52.50. The population standard deviation is known to be $6.10. The manager would like to determine whether or not the mean sales by all customers are significantly more than $50. What is the p-value for the test?
The tallest living man at one time had a height of 243 cm. The shortest living man at that time had a height of 127.5 cm. heights of men at that time had a mean of 170.52 cm and a standard deviation of 6.62. Which of these two men had the height that was more extreme? Use z scores
Is a measure of 29 inches "far away" from a mean of 19 inches? Suppose the data come from a sample whose standard deviation is 2 inches. A. How many standard deviation is 29 inches from 19 inches? b. Is 29 inches far away from a mean of 19 inches? c. Suppose the standard deviation of the underlying data is 7 inches. Is 29 inches far away from a mean of 19 inches?
An instructor claims that the average number of hours needed to study for a final exam in order to pass should be 5 hours. A student believes that the instructor is understating the number of hours needed to pass and surveys 36 students and finds the sample mean and standard deviation to be 5.7 and 1.5 hours respectively. Test the instructors claim at a .10 level.
You have a sample of 48 randomly selected Vancouverites. On average (the sample mean), the people in your sample spent 425 hours eating food in 2020. The least time a person in the sample spent eating food in 2020 is 367 hours and the most time a person in the sample spent eating food in 2020 is 484 hours. What would be your best guess about the population standard deviation of the time a Vancouverite spent eating food in 2020? Give the number and explain (including assumptions you make about the population distribution).
Do political science classes require less writing than history classes? The 41 randomly selected political science classes assigned an average of 13.1 pages of essay writing for the course. The standard deviation for these 41 classes was 5.8 pages. The 44 randomly selected history classes assigned an average of 14 pages of essay writing for the course. The standard deviation for these 44 classes was 5.5 pages. What can be concluded at the � = 0.01 level of significance?
Mario's weekly poker winnings have a mean of $353 and a standard deviation of $67. Last week he won $185. How many standard deviations from the mean is that?
A successful basketball player has a height of 6 feet 11 inches, or 211 cm. Based on statistics from a data set, his height converts to the z score of 5.17. How many standard deviations is his height above the mean?
R Do political science classes require more writing than history classes? The 55 randomly selected political science classes assigned an average of 16.9 pages of essay writing for the course. The standard deviation for these 55 classes was 3.8 pages. The 44 randomly selected history classes assigned an average of 14.8 pages of essay writing for the course. The standard deviation for these 44 classes was 4.6 pages. What can be concluded at the a = 0.10 level of significance? For this study, we should use Select an answer a. The null and alternative hypotheses would be: Select an answer Select an answer Select an answer Select an answer Select an answer Select an answer b. The test statistic ? O (please show your answer to 3 decimal places.) c. The p-value (Please show your answer to 4 decimal places.) %3D d. The p-value is ? a e. Based on this, we should Select an answer O the null hypothesis. f. Thus, the final conclusion is that ... The results are statistically significant at a =…
Use z scores to compare the given values. The tallest living man at one time had a height of 245 cm. The shortest living man at that time had a height of 60.8 cm. Heights of men at that time had a mean of 173.94 cm and a standard deviation of 6.92 cm. Which of these two men had the height that was more extreme?
Is it worth pursuing a doctoral degree in education if you already have an undergraduate degree? One way to help make this decision is to look at the mean incomes of these two groups. Suppose that 11 people with bachelor’s degrees in education were surveyed. Their mean annual salary was $45,000 with a standard deviation of $9700. Seventeen people with doctoral degrees in education were found to have a mean annual salary of $31,000 with a standard deviation of $10,000. Assume that the population variances are not the same. Construct a 95% confidence interval to estimate the true difference between the mean salaries for people with doctoral degrees and undergraduate degrees in education. Let Population 1 be the salaries for people with doctoral degrees and Population 2 be the salaries for people with undergraduate degrees. Round the endpoints of the interval to the nearest whole number, if necessary. LOWER AND UPPER ENDPOINT

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