Question 6Calculate the standard deviation. The volume (in litres) of water consumed by 60 runners during an ultra marathon is presented in the grouped frequencydistribution below.Volume (litres)1.5 < 2.02.0 < 2.52.5 3.03.0 3.5ΣلماRunners82817760

Given data is Volume(litres) Runners 1.5<2.0 8 2.0<2.5 28 2.5<3.0 17 3.0<3.5…

Answered: Question 6 Calculate the standard…

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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Question 7 The average monthly rainfall in Southern Ontario is 26 mm. If rainfall data over the year is normally distributed with a standard deviation of 3.8 mm. Calculate the probability that it will rain between 20 mm and 30 mm. Include a sketch for the z- scores.
Question 14 Find the F-test statistic to test the claim that the population variances are equal. Both distributions are normal. The standard deviation of the first sample is 3.9252 5.5336 is the standard deviation of the second sample. Submit Question LEGO
Question 22 An article reports that its author used a 25-item test (with dichotomous scoring for each item), the mean of total test scores was 14, and the standard deviation of the total test scores was 6. Estimate reliability.
Question 10 く Suppose that we are studying the amount of time customers wait in line at the checkout at the Gap and Old Navy. The avérage wait time at both stores is five minutes. At the Gap, the standard deviation for the wait time is 2 minutes; at Old Navy the standard deviation for the wait time is 5 minutes. Because Old Navy has a higher standard deviation, we know that there is Select an answer v in the wait times at Old Navy. Overall, wait times at Old Navy are Select an answer v from the average; wait times at the Gap are Select an answer v near the average.
Question 5 A particular fruit's weights are normally distributed, with a mean of 479 grams and a standard deviation of 17 grams. If you pick 24 fruits at random, then 12% of the time, their mean weight will be greater than how many grams? Give your answer to the nearest gram.
Question 7 Test scores were recorded for students in a statistics class. The scores for the first test had a standard deviation of 3.8 points. The scores from the second test had a standard deviation of 4.8 points. Choose the correct statement below. O The average test grade rose by 1 point. O The higher standard deviation of the second test indicates higher average scores on the second test than on the first test. O The scores of the second test were closer together than the first test. O The scores of the first test were closer together than the second test. O None of the above statements are true. 1 pts
Question 10 The average and standard deviation of the weights of 350 Indian students are 55 kg and 3 kg respectively. And the average and standard deviation of weights of 450 German students are 60 kg and 4 kg respectively. a. Determine the combined mean weight of all those Indian and German students. b. Find the standard deviation of weight for the combined group of students.
Question 8 A survey found that women's heights are normally distributed with mean 64.2 inches and standard deviation 2.6 inches The survey also found that men's heights are normally distributed with mean 69.6 inches and standard deviation 3.4 inches Most of the live characters employed at an amusement park have height requirements of a minimum of 57 inches and a maximum of 64 inches 1. The percentage of men who meet the height requirement is _____ Circle which one is correct 2. Since most men (meet/do not meet) the height requirement, it is likely that most of the characters are (women/men) 3. The new height requirements are a minimum of______ inches and and maximum of _______inches
QUESTION 3 Two classes A and B of 200 students each take the same examination, out of 100 points. The average grade for class A is 80 with a standard deviation of 10 point s. The average grade for class B is 75 with a standard deviation of 15 points. Assume that the grades in both classes are normally distributed. If the passing grade is 60, how many more students passed the examination in class A than in class B?
Question 22
Question 7 Use the following information to answer Question 7 and Question 8.The marks of six students in a Mathematics test are represented by the variable x. The following data was produced: n=6, Σx = 279 and Σx2= 13 093.Find the mean and standard deviation of the following data.A. mean =46.5 , standard deviation = 5.82B. mean = 52.5, standard deviation = 4.89C. mean =46.5 , standard deviation = 4.89D. mean =52.5 , standard deviation = 5.82 Question 8 It was later discovered that one of the values was incorrectly recorded as 43. The correct value, in fact, is 34. Find the new values of the mean and standard deviation.A. mean = 45 , standard deviation = 7.07B. mean = 51, standard deviation = 6.84C. mean = 45 , standard deviation = 6.84D. mean = 51 , standard deviation = 7.07
QUESTION 4 Eight independent measurements were made along a line and the standard deviation was found to be 10.55. Determine the error at 99.7% probability. State you answer to two decimal places.

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Question 6 Calculate the standard deviation.