MY NOTESPRACTICE AThe method of tree-ring dating gave the following years A.D. for an archaeological excavation site. Assume that the population of x values has an approximately normal distribution.1,243 1,229 1,292 1,222 1,268 1,316 1,275 1,317 1,275A USE SALT(a) Use a calculator with mean and standard deviation keys to find, the sample mean year x and sample standard deviation s. (Round your answers to four decimal places.)x = 1270.7778A.D.S = 34.5897V yr(b) When finding an 90% confidence interval, what is the critical value for confidence level? (Give your answer to three decimal places.)t =What is the maximal margin of error when finding a 90% confidence interval for the mean of all tree-ring dates from this archaeological site? (Round your answer to the nearest wholenumber.)E =Find a 90% confidence interval for the mean of all tree-ring dates from this archaeological site. (Round your answers to the nearest whole number.)lower limitA.D.upper limitA.D.Need Help?Read ItWatch ItSubmit AssignmentSave Assignment ProgressMacBook Air

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Answered: MY NOTES PRACTIC The method of…

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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Use the following data to answer the following questions. You can use excel or any app. as calculator.46 93 5630 39 4524 48 4560 55 4547 62 7063 72 6145 72 6574 48 6373 55 4872 55 44 1. The mean value is __________. a. 55.8833 b. 55.5500 c. 45 d. 55.8333 2. The median value is __________. a. 55.8833 b. 55.5 c. 55 d. 45 3. The mode is __________. a. 55.8833 b. 45 c. 55 d. 55.8333 4. The range is __________. a. 67 b. 68 c. 69 d. 70 5. The first quartile is __________. a. 43 b. 44 c. 40 d. 45
The data is in the height column. Answer 7 to 10
QUESTION 7 You wish to estimate the average amount of money spent on holiday gift giving. You sample 50 people and you find a sample average of $275 with a sample standard deviation of $15. Which distribution should be used in developing an interval estimate for the population mean? a. standard distribution O b. z distribution C. binomial distribution O d.t distribution
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Excel's O a. COUNTIF function Ob. AVERAGE function O c. PivotTable report O d. SUM function can be used to construct a frequency distribution for quantitative data.
The mean and standard deviation of a set of 11 observations of time are 8 seconds and 2.5 seconds respectively. An observation, equal to the mean, is removed from the dataset. The new variance in seconds is approximately: A. 6.51 sec B. 7.00 sec C. 7.53sec D. 6.94 sec
Find the indicated IQ score. The graph to the right depicts IQ scores of adults, and those scores are normally distributed with a mean of 100 and a standard deviation of 15. Click to view page 1 of the table. Click to view page 2of tihe fable 0.9 The indicated IQ score, x, is (Round to one decimal place as needed.)
Question 12 A variable is normally distributed with mean 22 and standard deviation 7. Use your graphing calculator to find each of the following areas. Write your answers in decimal form. Round to the nearest thousandth as needed. a) Find the area to the left of 22. b) Find the area to the left of 20. c) Find the area to the right of 21. d) Find the area to the right of 23. e) Find the area between 20 and 29. Question Help: D Post to forum Calculator Submit Question
Find the mean of the data summarized in the given frequency distribution. Compare the computed mean to the actual mean of 52.5 degrees. Low Temperature (o F) 40 - 44 45 - 49 50 - 54 55 - 59 60 – 64 D Frequency 2 9. ... The mean of the frequency distribution is degrees. (Round to the nearest tenth as needed.) Which of the following best describes the relationship between the computed mean and the actual mean? O A. The computed mean is close to the actual mean because the difference between the means is more than 5% of the actual mean. B. The computed mean is not close to the actual mean because the difference between the means is less than 5% of the actual mean. C. The computed mean is not close to the actual mean because the difference between the means is more than 5% of the actual mean. D. The computed mean is close to the actual mean because the difference between the means is less than 5% of the actual mean.
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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
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