MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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- The commute time for Cypress College students who drive from their home to the college follows a normal distribution with a mean of 26 minutes and a standard deviation of 8 minutes. Determine the two commute times that will make up the middle 80% of student commute times. O 19.3 and 32.7 minutes 18.2 and 33.6 minutes O 17.4 and 34.1 minutes 15.7 and 36.3 minutes 16.8 and 34.2 minutesarrow_forwardWhat is the standard deviation of the data set comprising the numbers 4, 4, 6, 4 and 7? 1.59 1.99 1.41 1.26 None of the abovearrow_forwardCalculate the standard deviation and variance for the distribution below: 3, 4, 5, 5, 6, 7arrow_forward
- For the following data list, what fraction of the observations are within one standard deviation of the sample mean? 3, 3, 3, 3, 3, 3, 3, 3, 3, 4, 8, 9, 9, 9, 9, 9, 9, 9, 9, 9arrow_forwardThe manager of the local Walmart Supercenter is studying the number of items purchased by customers in the evening hours. Listed below is the number of items for a sample of 30 customers. 9 12 5 8 4 6 6 7 11 9 8 14 9 12 5 4 10 6 18 10 6 10 11 5 What is the mean number of items? What is the median number of items? What is the range of number of items? What is the standard deviation? About 95% of the number of items are between what two values? Lower limit 10 9 13 12 13 5 Organize the number of items into a frequency distribution. What is the lower limit of the second class? What is the mean of the data organized into a frequency distribution? What is the standard deviation of the data organized into a frequency distribution? Compare these values with those computed in parts (A) and (D). Why are they different? Upper limitarrow_forwardThe sample uric acid levels of selected basketball and tennis players of the same age and gender in a certain university were tested. The result is shown below. Is there a difference in the mean uric acid levels between basketball and tennis players? Use a = 0.05. Sample Standard Deviation Group Basketball players Mean 15 4.5 1.0 Tennis players 15 3.4 1.5arrow_forward
- calculate the standard deviation for the following sample data 2,4,5,5,7,8,9,10,11,12arrow_forwardUse the magnitudes (Richter scale) of the 120 earthquakes listed in the accompanying data table. Use technology to find the range, variance, and standard deviation. If another value, 8.00, is added to those listed in the data set, do the measures of variation change much? 3.272.452.542.432.752.372.192.421.911.432.851.731.992.322.332.704.742.873.382.722.833.423.952.993.873.473.082.942.703.602.842.373.033.232.593.643.242.662.352.432.813.952.522.922.983.412.272.562.933.162.201.151.934.002.542.832.352.311.522.801.951.602.452.332.081.553.201.491.812.551.662.352.452.082.192.752.002.792.392.671.692.881.841.991.862.561.972.183.671.553.162.461.881.502.793.283.822.752.452.712.541.642.183.032.361.481.922.322.651.411.391.802.242.302.481.732.402.442.482.44arrow_forwardA sample consists of the following N scores 1,9,8,5,7 calculate the standard deviationarrow_forward
- 9 The weights for a group of 18-month-old girls are normally distributed with a mean of 24.7pounds and a standard deviation of 2.2 pounds. Use the given table to find the percentage of 18-month-old girls who weigh between 22.2 and 23.1 pounds. z-score -3.0 -2.9 -2.8 -2.7 -2.6 -2.5 -2.4 -2.3 -2.2 -2.1 Percentile 0.13 0.19 0.26 0.35 0.47 0.62 0.82 1.07 1.39 1.79 z-score -2.0 -1.9 -1.8 -1.7 -1.6 -1.5 -1.4 -1.3 -1.2 -1.1 Percentile 2.28 2.87 3.59 4.46 5.48 6.68 8.08 9.68 11.51 13.57 z-score -1.0 -0.9 -0.8 -0.7 -0.6 -0.5 -0.4 -0.3 -0.2 -0.1 Percentile 15.87 18.41 21.19 24.20 27.43 30.85 34.46 38.21 42.07 46.02 ________% of 18-month-old girls weigh between 22.2 and 23.1 pounds. (Round the final answer to the nearest hundredth as needed. Round the z-score to the nearest tenth as needed.)arrow_forwardA. What is the standard deviation of this population? (2, 3, 6, 8, 11) B. What is the standard deviation of this sample? (3, 4, 5, 7, 8, 8, 9, 12)arrow_forward2. 60 matches were played in a football tournament. The table to the right shows the number of goals scored in all matches. Number of Goals 1 3 4 5 Number of Matches 18 20 3 a. Find the median number of goals scored per match. b. Find the mean number of goals scored per match. c. Calculate the standard deviation of the goals scored per match.arrow_forward
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