MATH 225N Week 3 Assignment; Standard Deviation

1. Question: A large company is interested to know the variation in yearly sales for its salespeople. The dataset shown below is the yearly sales for a sample of 5 salespeople (expressed in thousands of dollars): 40, 60, 65, 70, 80 Find the variance for this dataset. 2. Question: The data below are the monthly average high temperatures for November, December, January, and February in New York City from the Country Studies/Area Handbook Series sponsored by the U.S. Department of the Army between 1986 and 1998. What is the sample standard deviation? 54,42,40,40 3. Question: Which of the following lists of data has the smallest standard deviation? Select the correct answer below: 4. Question: Which of the data sets represented by the following histograms has the smallest standard deviation? Select the correct answer below: 5. Question: Which of the following lists of data has the largest standard deviation? Select the correct answer below: 6. Question: Which of the following lists of data has the largest standard deviation? Select the correct answer below: 7. Question: A company is interested to know the variation in yearly sales amount for all 5 salespeople in the company. The dataset shown below is the sales amount sold by the 5 salespeople in the company (expressed in thousands of dollars): 40,60,65,70,80 8. Question: The following data values represent the daily amount spent by a family during a 7 day summer vacation. Find the sample standard deviation of this dataset: $96, $125, $80, $110, $75, $100, $121 9. Question: Given a sample variance of 6, what is the approximate sample standard deviation? Select the correct answer below: 10. Question: The following dataset represents the pulse rate from a sample of football players ona football team. Find the standard deviation of the dataset, and round your answer to one decimal place. 66, 70, 75, 80, 84 11. Question: The following datavalues represent the daily amount spent by a family during a 7 day summer vacation. Find the population standard deviation of this dataset: $96, $125, $80, $110, $75, $100, $121 12. Question: Find the sample variance of the following set of data: 6, 12, 11, 11. 13. Question: Using the following set of data (the same as in the previous problem), find the sample standard deviation: 6, 12, 11, 11. The sample variance of this data set is 7.3. 14. Question: Find the sample variance of the following set of data: 5, 13, 9, 10, 5, 12 15. Question: Using the following set of data (the same as in the previous problem), find the sample standard deviation: 5, 13, 9, 10, 5, 12. The sample variance of this data set is 11.6. 16. Question: Find the sample variance of the following set of data: 9, 12, 9, 14, 6 17. Question: Using the following set of data (the same as in the previous problem), find the sample standard deviation: 9, 12, 9, 14, 6 18. Question: Find the sample variance of the following set of data: 10, 3, 10, 3, 9. 19. Question: Using the following set of data (the same as in the previous problem), find the sample standard deviation: 10, 3, 10, 3, 9.