Find the standard deviation, s, of sample data summarized in the frequency distribution table below by using the formula below, where x represents the classmidpoint, frepresents the class frequency, and n represents the total number of sample values. Also, compare the computed standard deviation to the standarddeviation obtained from the original list of data values, 11.1.S=n(n - 1)Interval30-3637-4344-5051-5758-6465-7172-78Frequency44183336Standard deviation =9.6 (Round to one decimal place as needed.)Consider a difference of 20% between two values of a standard deviation to be significant. How does this computed value compare with the given standarddeviation, 11.1?O A. The computed value is significantly greater than the given value.O B. The computed value is significantly less than the given value.C. The computed value is not significantly different from the given value.

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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 average weekly incomes, in £s, of 18 selected occupations in the United Kingdom were: 244, 146, 278, 396, 435, 641, 577, 122, 294 357, 802 730, 286, 484, 169,, 559, 208, 498 Find the median, mode, variance, range, mad, upper extreme, lower extreme. Draw a box plot to represent these incomes. Calculate the mean weekly income and the standard deviation. (HANDWRITTEN OR AT LEAST NOT IN A CODE FORM)
Find the range, sample standard deviation and inter-quartile range (IQR) of the following data set. 35 42 42 63 71 79 84 85 96 98 range = (Please enter an exact answer.) standard deviation (ss) = (Round to one decimal place.) IQR = (Please enter an exact answer.)A new number, 139, is added to the data set above. Find the range, sample standard deviation and IQR of the new data set.range = (Please enter an exact answer.) standard deviation = (Round to one decimal place.) IQR = (Please enter an exact answer.)Which measure of spread is less affected by the addition of the extreme observation? standard deviation Range IQR
a-c
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Please find the range, sample standard deviation and inter-quartile range (IQR) of the following data set. 22 35 36 46 46 56 58 69 76 93 range = (Please enter an exact answer.) standard deviation (ss) = (Please show your answer to one decimal place.) IQR =________ (Please enter an exact answer.)A new number, 215, is added to the data set above. Please find the new range, sample standard deviation and IQR of the new data set.range =________ (Please enter an exact answer.) standard deviation = ___________ (Please show your answer to one decimal place.) IQR =________ (Please enter an exact answer.)Which measure of spread is less affected by the addition of the extreme observation? IQR Range standard deviation
A researcher studied 5050 adults daily screen time. She had them record the amount of hours (rounded to the nearest hour) they spent looking, listening or reading at computer or cell phone daily. The frequency table below shows the results. Hours of Screen Time Frequency 7 5 8 6 9 4 10 5 11 8 12 10 13 9 14 3 The researcher found that the mean number of hours of the data set was 10.7210.72. She wants to also find range and standard deviation. Find the range of the data set.range = Find the standard deviation of the data setstandard deviation = Round your result to two decimal places.
I need help in this question of Probabiltiy The 21st Century grade of students in a certain school is normally distributed with a mean of 87.18 and a standard deviation of 2.99. What range of scores represents the middle 75% of the students?a)(85.12,91.25)b)(82.5,90.5)c)(81.53,88.67)d)(83.74,90.62)
z Scores LeBron James, one of the most successful basketball players of all time, has a height of 6 feet 8 inches, or 203 cm. Based on statistics from Data Set 1 “Body Data” in Appendix B, his height converts to the z score of 4.07. How many standard deviations is his height above the mean?
What was the age distribution of prehistoric Native Americans? Extensive anthropological studies in the southwestern United States gave the following information about a prehistoric extended family group of 84 members on what is now a Native American reservation. For this community, estimate the mean age expressed in years, the sample variance, and the sample standard deviation. For the ciass 31 and over, use 35.5 as the class midpoint. (Round your answers to one decimal place.) Age range (years) Number of individuals 1-10 11-20 19 21-30 15 31 and over 40 10
Consider the following sample data. Sample A: 11, 22, 33 Sample B: 81, 92, 103 Sample C: 1,100; 1,111; 1,122 (a) Find the mean and standard deviation for each sample. Sample A: Sample B: Sample C: Mean Sample Standard Deviation (b) What does this exercise show about the standard deviation? multiple choice The idea is to illustrate that the standard deviation is not a function of the value of the mean. The idea is to illustrate that the standard deviation is a function of the value of the mean.
Explain the circumstances for which the interquartile range is the preferred measure of dispersion. What is an advantage that the standard deviation has over the interquartile range? Choose the correct answer below. A. The interquartile range is preferred when the data are bell shaped. An advantage of the standard deviation is that it increases as the dispersion of the data increases. B. The interquartile range is preferred when the distribution is symmetric. An advantage of the standard deviation is that it is resistant to extreme values. C. The interquartile range is preferred when the data are skewed or have outliers. An advantage of the standard deviation is that it uses all the observations in its computation. D. The interquartile range is preferred when the data are bell shaped. An advantage of the standard deviation is that it is resistant to extreme values. E. The interquartile range is preferred when the data are not skewed or no have…

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