Age at diagnosis for each of 20 patients under treatment for meningitis was given in a research paper. Suppose the ages (in years) were as follows.18 18 25 19 23 20 63 18 21 18 201820 18 191828171818A USE SALT(a) Calculate the values of the sample mean and the standard deviation. (Round your standard deviation to four decimal places.)21.8510.0696sample meanyrstandard deviationyr(b) Compute the upper quartile, the lower quartile, and the interquartile range.upper quartile20.75v yrlower quartile18v yrinterquartile range2.75X yr(c) Are there any mild or extreme outliers present in this data set? (Enter your answers as comma-separated lists. If there is no answer, enter NONE.)mild outliersextreme outliers25,28,63

Given: The lower quartile is 18, and the upper quartile is 20.25.

Answered: Age at diagnosis for each of 20…

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 insurance company is looking over accident statistics. They want to model the population of all drivers for the population parameter of the standard deviation and variance of the age of the driver involved in an automobile accident. They have a sample of 100 accidents from around the country. The age of the driver in each of these accidents is provided below. Use Excel to calculate the sample standard deviation and the sample variance. Round your answers to one decimal place. Do not round until you've calculated your final answer "Age of people in accident"48643346436728189044472440202747683248472248217347302918487364454920205066654187873417203176493089672222455023481746382942254720463119214227226621236675744621461969202048238851284918204522313823284939 Standard deviation: Variance:
Below are data of a correlation between two quiz scores, Quiz 1 and Quiz 2. What might you tell me about the results (.05 significance value)? Provide a brief description of the mean and standard deviation.
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answer the blanks 1,2,3,4
eight successive days at two different sites. Particulate matter was measured in these samples (µg/m3) as an index of environmental quality. The data is presented below. Calculate the Mean and Standard Deviation of particulate matter. Which answer provides the best answer? NOTE: Round your answers to two decimals. matter site 1 1 1 1 68 22 36 32 42 24 1 1 28 1 38 1 36 1 38 1 39 2 40 2 36 2 34 2 33 2 32 O Mean: 36.13 Standard Deviation: 10.14 O Mean: 578, Standard Deviation: 102.78 O Mean: 10.14, Standard Deviation: 36.13 O None of these choices are correct.
3565 6781 11366 5656 10024 9101 9286 10376 7290 15558 6657 20795 4027 19100 16223 14502 2830 5785 9070 7560 D) Calculate the mean and standard deviation of your data set. You may use technology such as Google Sheets, Excel, or a TI-83/TI-84. Round to the nearest hundredth. Mean 9777.6 Standard Deviation 5090.73 E) Using a significance level a = 0.05, find the critical value using the following steps. 1. What are the degrees of freedom? n D20 d. f.= n- 1=19 = 19 2. Will this be a one-tailed or two tailed test? two-tailed 3. Using table 5 from the back of your textbook (page A18 in Appendix B), what is the critical value? 1.729
The mass of each 60 peddles collected from a beach was measured. The results, correct to the nearest gram, are summarised in the following table. Mass 10 – 14 15 – 19 20 – 24 25 – 29 30 – 34 35 – 39 Frequency 8 14 17 11 4 (a) Calculate the mean, median and standard deviation.
MY DATA 2.54 Raisins The number of raisins in each EX0254 of 14 miniboxes (1/2-ounce size) was counted for a generic brand and for Sunmaid brand raisins. The two data sets are shown here: Generic Brand Sunmaid 25 26 25 28 25 29 24 24 26 28 28 27 28 24 28 22 26 27 24 25 25 28 30 27 26 26 28 24 a. What are the mean and standard deviation for the generic brand? b. What are the mean and standard deviation for the Sunmaid brand? c. Compare the centers and variabilities of the two brands using the results of parts a and b. 2.55 Raisins, continued Refer to Exercise 2.54. a. Find the median, the upper and lower quartiles, and the IQR for each of the two data sets. b. Construct two box plots on the same horizontal scale to compare the two sets of data. c. Draw two stem and leaf plots to depict the shapes of the two data sets. Do the box plots in part b verify these results? d. If we can assume that none of the boxes of raisins are being underfilled (that is, they all weigh approximately 1/2…
3.2/4
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Question 3 Match the questions with answers. Use this sample data for all questions: Table 2: Time taken in seconds. Sample 290, 340, 150, 300, 200, 100, 400, 500, 600, 89, 94 What is the mean for table 2? A. 278.45 What is the median for table 2? B. no mode v What is the mode for table 2? C. 172.06 v What is the sample standard deviation for table2 ? D. -0.46 Calculate the 75th percentile for table 2. E. 622.58 v What is the interquartile range for table 2? F. 290.00 What is the z score for an x value of 200 using table 2? G. 0.46 v Using the empirical rule to find the range of values containing 95% of the data from table 2, what is the upper value of the range? Hint: use the mean and standard deviation you previously calculated. H. 794.64 I. 177.95 J. 400.00 K. 300.00 L. 198.38 M. 100 N. 370
According to a recent publication, the mean price of new mobile homes is $65,100. Assume a standard deviation of $7700. Let x denote the mean price of a sample of new mobile homes. a. For samples of 50 mobile homes, the mean and standard deviation of all possible sample mean prices are $_________ and $__________, respectively. (Round to the nearest cent as needed.) b. For samples of 200 mobile homes, the mean and standard deviation of all possible sample mean prices are $________and $_________, respectively. (Round to the nearest cent as needed.)

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